{"id":4801,"date":"2026-05-24T00:03:45","date_gmt":"2026-05-23T15:03:45","guid":{"rendered":"https:\/\/blog.id774.net\/entry\/?p=4801"},"modified":"2026-05-23T21:51:22","modified_gmt":"2026-05-23T12:51:22","slug":"2-5-inch-hdd-%e3%81%a7-luks-ext4-%e3%81%8c%e9%81%85%e3%81%8f%e3%81%aa%e3%81%a3%e3%81%9f%e7%90%86%e7%94%b1","status":"publish","type":"post","link":"https:\/\/blog.id774.net\/entry\/2026\/05\/24\/4801\/","title":{"rendered":"2.5-inch HDD \u3067 LUKS + ext4 \u304c\u9045\u304f\u306a\u3063\u305f\u7406\u7531"},"content":{"rendered":"

\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u5a92\u4f53\u306e\u8a2d\u8a08\u3067\u306f\u3001\u6697\u53f7\u5316\u65b9\u5f0f\u3001\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3001\u5a92\u4f53\u7a2e\u5225\u3001\u540c\u671f\u65b9\u5f0f\u3092\u8ad6\u7406\u7684\u306b\u6574\u3048\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3042\u308b\u3002\u3057\u304b\u3057\u3001\u8ad6\u7406\u7684\u306b\u6574\u3063\u305f\u69cb\u6210\u304c\u3001\u5b9f\u969b\u306e\u5a92\u4f53\u6027\u80fd\u306e\u4e0a\u3067\u3082\u6b63\u3057\u3044\u3068\u306f\u9650\u3089\u306a\u3044\u3002\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u306e\u672c\u8cea\u306f\u3001\u4fdd\u5b58\u3055\u308c\u305f\u30d5\u30a1\u30a4\u30eb\u304c\u5b58\u5728\u3059\u308b\u3053\u3068\u3067\u306f\u306a\u304f\u3001\u5fc5\u8981\u306a\u6642\u70b9\u3067\u5fa9\u5143\u3067\u304d\u308b\u72b6\u614b\u3092\u7dad\u6301\u3059\u308b\u3053\u3068\u3067\u3042\u308b[1]<\/a>\u3002\u307e\u305f\u3001\u7269\u7406\u5a92\u4f53\u7ba1\u7406\u306f\u3001\u5a92\u4f53\u5358\u4f53\u306e\u6b63\u5e38\u6027\u3067\u306f\u306a\u304f\u3001\u5fa9\u5143\u53ef\u80fd\u6027\u3092\u652f\u3048\u308b\u5f79\u5272\u5206\u62c5\u3068\u3057\u3066\u8a2d\u8a08\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b[2]<\/a>\u3002\u3053\u306e\u524d\u63d0\u306b\u7acb\u3064\u3068\u3001\u6697\u53f7\u5316\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3067\u91cd\u8981\u306a\u306e\u306f\u3001LUKS + ext4 \u304c\u7406\u5c48\u3068\u3057\u3066\u6b63\u3057\u3044\u304b\u3069\u3046\u304b\u3060\u3051\u3067\u306f\u306a\u304f\u3001\u305d\u306e\u69cb\u6210\u3092\u3069\u306e\u5a92\u4f53\u306b\u9069\u7528\u3057\u305f\u3068\u304d\u306b\u5b9f\u7528\u7684\u306a\u66f4\u65b0\u6027\u80fd\u3092\u7dad\u6301\u3067\u304d\u308b\u304b\u3067\u3042\u308b\u3002<\/p>\n

\u4eca\u56de\u306e\u767a\u7aef\u306f\u660e\u78ba\u3067\u3042\u308b\u3002\u5f93\u6765\u306e TrueCrypt + FAT \u69cb\u6210\u3067\u306f\u8a31\u5bb9\u3067\u304d\u3066\u3044\u305f\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u51e6\u7406\u3092\u3001LUKS + ext4 \u3078\u79fb\u884c\u3057\u305f\u3068\u3053\u308d\u3001\u7279\u306b 2.5-inch 2TB HDD \u3067\u5b9f\u7528\u306b\u8010\u3048\u306a\u3044\u6027\u80fd\u4f4e\u4e0b\u304c\u767a\u751f\u3057\u305f\u3002\u3053\u306e\u79fb\u884c\u306f\u3001\u5916\u4ed8\u3051\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u5a92\u4f53\u3060\u3051\u3092\u7f6e\u304d\u63db\u3048\u308b\u4f5c\u696d\u3067\u306f\u306a\u304b\u3063\u305f\u3002TrueCrypt \u8cc7\u7523\u3092 LUKS \u69cb\u6210\u3078\u79fb\u3057\u3066\u3044\u304f\u305f\u3081\u3001\u30b5\u30fc\u30d0\u30fc\u5074\u3067\u3082\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u5143\u3001\u4e2d\u7d99\u9818\u57df\u3001\u9000\u907f\u9818\u57df\u3092\u78ba\u4fdd\u3067\u304d\u308b\u3088\u3046\u306b HDD \u3092\u5927\u5bb9\u91cf\u3078\u63db\u88c5\u3057\u3001\u6697\u53f7\u5316\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u5168\u4f53\u3092\u73fe\u4ee3\u7684\u306a\u69cb\u6210\u3078\u5bc4\u305b\u308b\u610f\u56f3\u304c\u3042\u3063\u305f\u3002<\/p>\n

\"\"<\/a><\/p>\n

\u4e00\u65b9\u3067\u3001Seagate Expansion Portable 5TB\uff08STKM5000400\uff09\u3067\u306f\u540c\u3058\u3088\u3046\u306a\u81f4\u547d\u7684\u6027\u80fd\u554f\u984c\u306f\u767a\u751f\u3057\u306a\u304b\u3063\u305f\u3002\u3055\u3089\u306b\u3001\u30b3\u30d4\u30fc\u51e6\u7406\u306b cp \u3067\u306f\u306a\u304f rsync \u3092\u4f7f\u3063\u3066\u3082\u540c\u69d8\u306e\u50be\u5411\u304c\u51fa\u3066\u3044\u308b\u305f\u3081\u3001\u3053\u306e\u8a18\u4e8b\u3067\u306f\u30b3\u30d4\u30fc\u30b3\u30de\u30f3\u30c9\u306e\u7a2e\u985e\u3092\u4e3b\u8981\u56e0\u304b\u3089\u9664\u5916\u3059\u308b\u3002\u554f\u984c\u306f\u3001TrueCrypt \u304b\u3089 LUKS \u3078\u5909\u3048\u305f\u3053\u3068\u3060\u3051\u3067\u3082\u3001cp \u3068 rsync \u306e\u9055\u3044\u3067\u3082\u306a\u304f\u3001\u30b5\u30fc\u30d0\u30fc\u5074\u5bb9\u91cf\u306e\u62e1\u5f35\u3001\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u5a92\u4f53\u306e\u518d\u7de8\u30012.5-inch HDD\u3001SMR\u3001ext4\u3001LUKS\u3001\u521d\u56de\u6295\u5165\u3001\u30e1\u30bf\u30c7\u30fc\u30bf\u66f4\u65b0\u304c\u91cd\u306a\u3063\u305f\u8907\u5408\u4e8b\u8c61\u3068\u3057\u3066\u6271\u3046\u3002<\/p>\n

LUKS \u306e\u624b\u9806\u3068\u904b\u7528\u306f\u3001\u6697\u53f7\u5316\u5a92\u4f53\u3092\u5b89\u5168\u306b\u6271\u3046\u305f\u3081\u306e\u57fa\u790e\u3068\u3057\u3066\u6574\u7406\u6e08\u307f\u3067\u3042\u308b[3]<\/a>\u3002\u307e\u305f\u3001TrueCrypt \u8cc7\u7523\u306f\u65b0\u898f\u63a1\u7528\u3067\u306f\u306a\u304f\u65e2\u5b58\u8cc7\u7523\u306e\u4fdd\u5168\u5bfe\u8c61\u3068\u3057\u3066\u6271\u3046\u3079\u304d\u3067\u3042\u308a\u3001\u65e7\u5a92\u4f53\u3092\u76f4\u3061\u306b\u5168\u5ec3\u3059\u3079\u304d\u304b\u3069\u3046\u304b\u306f\u3001\u5fa9\u5143\u53ef\u80fd\u6027\u3001\u5a92\u4f53\u6027\u80fd\u3001\u79fb\u884c\u30b3\u30b9\u30c8\u3001\u66f4\u65b0\u983b\u5ea6\u3092\u5408\u308f\u305b\u3066\u5224\u65ad\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b[4]<\/a>\u3002\u6697\u53f7\u5316\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u306f\u3001\u9375\u3001\u30d8\u30c3\u30c0\u30fc\u3001\u74b0\u5883\u3001\u624b\u9806\u304c\u63c3\u3063\u3066\u521d\u3081\u3066\u5c06\u6765\u306e\u81ea\u5206\u304c\u958b\u3051\u308b\u3082\u306e\u3067\u3042\u308a\u3001\u4fdd\u5b58\u3057\u305f\u3068\u3044\u3046\u4e8b\u5b9f\u3060\u3051\u3067\u306f\u610f\u5473\u3092\u6b8b\u305b\u306a\u3044[5]<\/a>\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u3053\u306e\u8a18\u4e8b\u3067\u306f\u300c\u5b89\u5168\u305d\u3046\u3060\u304b\u3089\u5168\u5a92\u4f53\u3092 LUKS + ext4 \u306b\u7d71\u4e00\u3059\u308b\u300d\u3068\u3044\u3046\u673a\u4e0a\u306e\u8ad6\u7406\u304c\u30012.5-inch HDD \u306e\u73fe\u5b9f\u306e\u6027\u80fd\u5236\u7d04\u306b\u3076\u3064\u304b\u3063\u305f\u4e8b\u4f8b\u3068\u3057\u3066\u3001\u8981\u56e0\u3092\u3072\u3068\u3064\u305a\u3064\u5b9a\u91cf\u7684\u306b\u5206\u89e3\u3059\u308b\u3002<\/p>\n

\n

1. 2.5-inch HDD \u3067\u6027\u80fd\u554f\u984c\u304c\u767a\u751f\u3057\u305f<\/h2>\n

\u4e8b\u8c61\u3092\u6700\u521d\u306b\u56fa\u5b9a\u3059\u308b\u3002\u65e7\u69cb\u6210\u306f TrueCrypt + FAT \u3067\u3042\u308a\u3001\u65b0\u69cb\u6210\u306f LUKS + ext4 \u3067\u3042\u308b\u3002\u5a92\u4f53\u306f 2.5-inch HDD \u3092\u542b\u307f\u3001\u7279\u306b Transcend StoreJet 25M3S 2TB\uff08TS2TSJ25M3S\uff09\u3067\u6027\u80fd\u554f\u984c\u304c\u9855\u8457\u3060\u3063\u305f\u3002\u4e00\u65b9\u3001Seagate Expansion Portable 5TB\uff08STKM5000400\uff09\u3067\u306f\u3001\u540c\u3058 LUKS + ext4 \u79fb\u884c\u5f8c\u3067\u3082\u9855\u8457\u306a\u6027\u80fd\u554f\u984c\u306f\u767a\u751f\u3057\u306a\u304b\u3063\u305f\u3002Seagate Expansion Portable \u306e\u8cc7\u6599\u3067\u306f\u3001STKM5000400 \u306f 5TB \u30e2\u30c7\u30eb\u3068\u3057\u3066\u5217\u6319\u3055\u308c\u3001\u5bb9\u91cf 4TB \u4ee5\u4e0a\u306e\u7b50\u4f53\u5bf8\u6cd5\u306f\u9577\u3055 115.3 mm\u3001\u5e45 80 mm\u3001\u5965\u884c\u304d 20.9 mm\u3001\u91cd\u91cf 0.257 kg \u3068\u3055\u308c\u3066\u3044\u308b[6]<\/a>\u3002\u540c\u3058 2.5-inch \u5916\u4ed8\u3051 HDD \u3067\u3042\u3063\u3066\u3082\u3001\u7b50\u4f53\u539a\u3001\u5185\u8535\u30c9\u30e9\u30a4\u30d6\u4e16\u4ee3\u3001\u8a18\u9332\u65b9\u5f0f\u3001\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u51e6\u7406\u3001USB \u30d6\u30ea\u30c3\u30b8\u306e\u5dee\u304c\u3042\u308a\u3001\u300c2.5-inch HDD\u300d\u3068\u3044\u3046\u5206\u985e\u3060\u3051\u3067\u306f\u6027\u80fd\u3092\u4e88\u6e2c\u3067\u304d\u306a\u3044\u3002<\/p>\n\n\n\n\n\n\n\n
\u89b3\u6e2c\u5bfe\u8c61<\/th>\n\u5bb9\u91cf<\/th>\n\u69cb\u6210<\/th>\n\u89b3\u6e2c\u7d50\u679c<\/th>\n\u5206\u6790\u4e0a\u306e\u610f\u5473<\/th>\n<\/tr>\n<\/thead>\n
Transcend StoreJet 25M3S<\/td>\n2TB<\/td>\nLUKS + ext4<\/td>\n\u6027\u80fd\u554f\u984c\u304c\u9855\u8457\u306b\u767a\u751f\u3057\u305f\u3002<\/td>\n2.5-inch HDD \u306e\u4e2d\u3067\u3082\u3001\u4f4e IOPS\u3001SMR\u3001\u521d\u56de\u6295\u5165\u3001ext4 \u30e1\u30bf\u30c7\u30fc\u30bf\u66f4\u65b0\u306e\u5f71\u97ff\u304c\u5f37\u304f\u51fa\u305f\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/td>\n<\/tr>\n
Seagate Expansion Portable STKM5000400<\/td>\n5TB<\/td>\nLUKS + ext4<\/td>\n\u9855\u8457\u306a\u6027\u80fd\u554f\u984c\u306f\u767a\u751f\u3057\u306a\u304b\u3063\u305f\u3002<\/td>\n\u5bb9\u91cf\u304c\u5927\u304d\u3044 2.5-inch HDD \u3067\u3082\u4e00\u5f8b\u306b\u9045\u3044\u308f\u3051\u3067\u306f\u306a\u304f\u3001\u500b\u5225\u5a92\u4f53\u306e\u8a2d\u8a08\u5dee\u304c\u5927\u304d\u3044\u3002<\/td>\n<\/tr>\n
Stick SSD<\/td>\n2TB \u7d1a<\/td>\nLUKS + ext4<\/td>\n2.5-inch 2TB HDD \u307b\u3069\u6975\u7aef\u3067\u306f\u306a\u304b\u3063\u305f\u3002<\/td>\n\u6697\u53f7\u5316\u65b9\u5f0f\u5358\u4f53\u3067\u306f\u306a\u304f\u3001\u5a92\u4f53\u5c64\u306e\u6a5f\u68b0\u7684\u30ec\u30a4\u30c6\u30f3\u30b7\u3068\u5c0f\u66f8\u304d\u8fbc\u307f\u8010\u6027\u304c\u652f\u914d\u8981\u56e0\u3067\u3042\u308b\u3053\u3068\u3092\u793a\u3059\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u3053\u306e\u6bd4\u8f03\u304b\u3089\u3001\u5358\u7d14\u306a\u7d50\u8ad6\u306f 2 \u3064\u5426\u5b9a\u3067\u304d\u308b\u3002\u7b2c\u4e00\u306b\u3001LUKS + ext4 \u306f\u5e38\u306b\u9045\u3044\u3001\u3068\u3044\u3046\u7d50\u8ad6\u306f\u8aa4\u308a\u3067\u3042\u308b\u30025TB HDD \u3068 Stick SSD \u3067\u306f\u540c\u3058\u3088\u3046\u306a\u81f4\u547d\u7684\u554f\u984c\u304c\u51fa\u3066\u3044\u306a\u3044\u305f\u3081\u3067\u3042\u308b\u3002\u7b2c\u4e8c\u306b\u30012.5-inch HDD \u306f\u5e38\u306b\u3060\u3081\u3060\u3001\u3068\u3044\u3046\u7d50\u8ad6\u3082\u7c97\u3044\u30025TB \u306e 2.5-inch HDD \u3067\u306f\u5b9f\u7528\u4e0a\u306e\u554f\u984c\u304c\u76ee\u7acb\u305f\u306a\u304b\u3063\u305f\u305f\u3081\u3067\u3042\u308b\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u6b63\u3057\u3044\u554f\u3044\u306f\u3001\u300c\u306a\u305c\u7279\u5b9a\u306e 2.5-inch 2TB HDD \u3067\u3001LUKS + ext4 \u306e\u5927\u91cf\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u66f4\u65b0\u304c\u7834\u7dbb\u3057\u305f\u306e\u304b\u300d\u3067\u3042\u308b\u3002<\/p>\n

\n

2. \u5909\u66f4\u3055\u308c\u305f\u8981\u7d20\u3092\u5206\u89e3\u3059\u308b<\/h2>\n

\u4eca\u56de\u306e\u79fb\u884c\u3067\u306f\u3001\u6697\u53f7\u5316\u65b9\u5f0f\u3060\u3051\u304c\u5909\u308f\u3063\u305f\u308f\u3051\u3067\u306f\u306a\u3044\u3002TrueCrypt + FAT \u304b\u3089 LUKS + ext4 \u3078\u5909\u3048\u305f\u6642\u70b9\u3067\u3001\u30d6\u30ed\u30c3\u30af\u6697\u53f7\u5316\u5c64\u3001\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u5c64\u3001\u30e1\u30bf\u30c7\u30fc\u30bf\u7ba1\u7406\u3001\u30b8\u30e3\u30fc\u30ca\u30ea\u30f3\u30b0\u3001\u66f8\u304d\u8fbc\u307f\u9806\u5e8f\u4fdd\u8a3c\u3001\u521d\u671f\u5316\u51e6\u7406\u3001\u5a92\u4f53\u4e0a\u306e\u66f4\u65b0\u30d1\u30bf\u30fc\u30f3\u304c\u540c\u6642\u306b\u5909\u308f\u3063\u3066\u3044\u308b\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u300cLUKS \u304c\u9045\u3044\u300d\u3068\u77ed\u7d61\u3059\u308b\u3068\u3001\u539f\u56e0\u306e\u5927\u90e8\u5206\u3092\u898b\u8aa4\u308b\u3002<\/p>\n\n\n\n\n\n\n\n\n\n
\u5c64<\/th>\n\u65e7\u69cb\u6210<\/th>\n\u65b0\u69cb\u6210<\/th>\n\u6027\u80fd\u4e0a\u306e\u5909\u5316<\/th>\n<\/tr>\n<\/thead>\n
\u6697\u53f7\u5316\u5c64<\/td>\nTrueCrypt<\/td>\nLUKS \/ dm-crypt<\/td>\n\u6697\u53f7\u5316\u51e6\u7406\u306e\u5b9f\u88c5\u3001I\/O \u30ad\u30e5\u30fc\u3001\u30d6\u30ed\u30c3\u30af\u30c7\u30d0\u30a4\u30b9\u306e\u898b\u3048\u65b9\u304c\u5909\u308f\u308b\u3002<\/td>\n<\/tr>\n
\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u5c64<\/td>\nFAT<\/td>\next4<\/td>\njournal\u3001inode\u3001Unix \u6a29\u9650\u3001\u6240\u6709\u8005\u3001\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3001barrier \u304c\u52a0\u308f\u308b\u3002<\/td>\n<\/tr>\n
\u521d\u671f\u5316\u72b6\u614b<\/td>\n\u65e2\u5b58\u5a92\u4f53<\/td>\nmkfs.ext4 \u76f4\u5f8c<\/td>\ninode table \u3084 journal \u306e\u9045\u5ef6\u521d\u671f\u5316\u304c\u521d\u56de\u66f8\u304d\u8fbc\u307f\u3068\u7af6\u5408\u3057\u3046\u308b\u3002<\/td>\n<\/tr>\n
\u5a92\u4f53\u5c64<\/td>\n2.5-inch HDD<\/td>\n\u540c\u3058 2.5-inch HDD<\/td>\n\u5a92\u4f53\u306f\u540c\u3058\u3067\u3082\u3001\u8981\u6c42\u3055\u308c\u308b I\/O \u30d1\u30bf\u30fc\u30f3\u304c\u5909\u308f\u308b\u3002<\/td>\n<\/tr>\n
\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u5c64<\/td>\n\u5927\u91cf\u30d5\u30a1\u30a4\u30eb\u30d0\u30c3\u30af\u30a2\u30c3\u30d7<\/td>\n\u540c\u3058\u5927\u91cf\u30d5\u30a1\u30a4\u30eb\u30d0\u30c3\u30af\u30a2\u30c3\u30d7<\/td>\n\u7dcf\u5bb9\u91cf\u3060\u3051\u3067\u306a\u304f\u3001\u30d5\u30a1\u30a4\u30eb\u6570\u3001\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u6570\u3001\u30e1\u30bf\u30c7\u30fc\u30bf\u66f4\u65b0\u56de\u6570\u304c\u52b9\u304f\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u3053\u306e\u69cb\u9020\u3067\u306f\u3001\u539f\u56e0\u306f\u5358\u4e00\u3067\u306f\u306a\u304f\u3001\u5f31\u3044\u5c64\u304c\u76f4\u5217\u306b\u7a4d\u307f\u91cd\u306a\u308b\u3002\u6697\u53f7\u5316\u5c64\u3067\u5c11\u3057\u9045\u304f\u306a\u308a\u3001ext4 \u3067\u30e1\u30bf\u30c7\u30fc\u30bf\u66f4\u65b0\u304c\u5897\u3048\u3001journal commit \u3068 barrier \u3067\u5f85\u3061\u304c\u5165\u308a\u3001HDD \u306e seek \u3068\u56de\u8ee2\u5f85\u3061\u304c\u7d2f\u7a4d\u3057\u3001\u3055\u3089\u306b SMR \u3067\u5185\u90e8\u518d\u914d\u7f6e\u304c\u767a\u751f\u3059\u308b\u3068\u3001\u5408\u8a08\u306e\u9045\u5ef6\u306f\u7dda\u5f62\u3067\u306f\u306a\u304f\u6bb5\u968e\u7684\u306b\u60aa\u5316\u3059\u308b\u3002\u3068\u304f\u306b 2.5-inch HDD \u306f\u516c\u79f0\u8ee2\u9001\u901f\u5ea6\u3060\u3051\u3067\u306f\u8a55\u4fa1\u3067\u304d\u306a\u3044\u3002\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u306e\u3088\u3046\u306a\u9577\u6642\u9593\u66f8\u304d\u8fbc\u307f\u3067\u306f\u3001\u77ac\u9593\u7684\u306a MB\/s \u3088\u308a\u3082\u3001\u6301\u7d9a\u66f8\u304d\u8fbc\u307f\u3001\u5c0f\u66f8\u304d\u8fbc\u307f\u3001\u30e1\u30bf\u30c7\u30fc\u30bf\u66f4\u65b0\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u67af\u6e07\u5f8c\u306e\u6319\u52d5\u304c\u652f\u914d\u7684\u306b\u306a\u308b\u3002<\/p>\n

\n

3. 2.5-inch HDD \u306e\u516c\u79f0\u6027\u80fd\u3092\u78ba\u8a8d\u3059\u308b<\/h2>\n

Seagate BarraCuda 2.5-inch HDD \u306e\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u306f\u30015TB\u30014TB\u30013TB\u30012TB\u30011TB \u30e2\u30c7\u30eb\u3092\u4e26\u3079\u30015TB \u304b\u3089 2TB \u307e\u3067\u306e\u30e2\u30c7\u30eb\u306b\u3064\u3044\u3066\u3001\u8ad6\u7406 \/ \u7269\u7406\u30bb\u30af\u30bf\u30fc\u3092 512 \/ 4096\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3092 SATA 6Gb\/s\u3001\u30c7\u30fc\u30bf\u8ee2\u9001\u901f\u5ea6\u3092\u6700\u5927 140 MB\/s\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3092 128 MB\u3001\u56de\u8ee2\u6570\u3092 5400 rpm\u3001\u8a18\u9332\u65b9\u5f0f\u3092 SMR \u3068\u3057\u3066\u3044\u308b[7]<\/a>\u3002\u3053\u3053\u3067\u91cd\u8981\u306a\u306e\u306f\u30015TB \u3068 2TB \u304c\u540c\u3058\u304f\u6700\u5927 140 MB\/s\u3001128 MB cache\u30015400 rpm\u3001SMR \u3068\u3055\u308c\u3066\u3044\u308b\u70b9\u3067\u3042\u308b\u3002\u3064\u307e\u308a\u3001\u4ed5\u69d8\u8868\u4e0a\u306f\u8fd1\u3044\u6570\u5024\u306b\u898b\u3048\u308b\u304c\u3001\u5b9f\u904b\u7528\u3067\u306f 5TB \u3067\u554f\u984c\u304c\u51fa\u305a 2TB \u3067\u554f\u984c\u304c\u51fa\u305f\u3002\u3053\u306e\u5dee\u306f\u3001\u516c\u79f0\u8ee2\u9001\u901f\u5ea6\u3060\u3051\u3067\u306f\u8aac\u660e\u3067\u304d\u306a\u3044\u3002<\/p>\n\n\n\n\n\n\n\n\n\n\n
\u6307\u6a19<\/th>\nSeagate BarraCuda 5TB<\/th>\nSeagate BarraCuda 2TB<\/th>\n\u8aad\u307f\u53d6\u308a\u65b9<\/th>\n<\/tr>\n<\/thead>\n
\u30c7\u30fc\u30bf\u8ee2\u9001\u901f\u5ea6<\/td>\n\u6700\u5927 140 MB\/s<\/td>\n\u6700\u5927 140 MB\/s<\/td>\n\u5927\u304d\u306a\u9023\u7d9a I\/O \u5bc4\u308a\u306e\u76ee\u5b89\u3067\u3042\u308a\u3001\u5c0f\u30d5\u30a1\u30a4\u30eb\u5927\u91cf\u66f4\u65b0\u306e\u671f\u5f85\u5024\u3067\u306f\u306a\u3044\u3002<\/td>\n<\/tr>\n
\u56de\u8ee2\u6570<\/td>\n5400 rpm<\/td>\n5400 rpm<\/td>\n\u6a5f\u68b0\u7684\u30ec\u30a4\u30c6\u30f3\u30b7\u306f SSD \u3088\u308a\u5927\u304d\u304f\u3001\u30e9\u30f3\u30c0\u30e0 I\/O \u3067\u306f\u4e0d\u5229\u3067\u3042\u308b\u3002<\/td>\n<\/tr>\n
\u30ad\u30e3\u30c3\u30b7\u30e5<\/td>\n128 MB<\/td>\n128 MB<\/td>\n\u77ed\u6642\u9593\u306e\u5438\u53ce\u306b\u306f\u52b9\u304f\u304c\u3001TB \u7d1a\u306e\u9577\u6642\u9593\u6295\u5165\u3067\u306f\u67af\u6e07\u5f8c\u306e\u6319\u52d5\u304c\u91cd\u8981\u306b\u306a\u308b\u3002<\/td>\n<\/tr>\n
\u8a18\u9332\u65b9\u5f0f<\/td>\nSMR<\/td>\nSMR<\/td>\n\u9806\u6b21\u66f8\u304d\u8fbc\u307f\u306b\u306f\u5f37\u3044\u304c\u3001\u66f4\u65b0\u6df7\u5728\u3084\u30e9\u30f3\u30c0\u30e0\u66f8\u304d\u8fbc\u307f\u3067\u5931\u901f\u3057\u3046\u308b\u3002<\/td>\n<\/tr>\n
\u7b50\u4f53\u539a<\/td>\n15.0 mm<\/td>\n7.0 mm<\/td>\n\u540c\u3058 2.5-inch \u3067\u3082\u7269\u7406\u8a2d\u8a08\u304c\u7570\u306a\u308a\u3001\u71b1\u3001\u30d7\u30e9\u30c3\u30bf\u30fc\u69cb\u6210\u3001\u5b9f\u88c5\u4f59\u88d5\u304c\u7570\u306a\u308b\u3002<\/td>\n<\/tr>\n
\u91cd\u91cf<\/td>\n190 g<\/td>\n90 g<\/td>\n5TB \u3068 2TB \u306f\u540c\u3058\u5206\u985e\u3067\u3082\u5b9f\u4f53\u3068\u3057\u3066\u5225\u306e\u6a5f\u68b0\u3067\u3042\u308b\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u3053\u306e\u8868\u304b\u3089\u8aad\u307f\u53d6\u308b\u3079\u304d\u3053\u3068\u306f\u30015TB HDD \u3067\u554f\u984c\u304c\u51fa\u306a\u304b\u3063\u305f\u4e8b\u5b9f\u306f\u30012TB HDD \u306e\u554f\u984c\u3092\u5426\u5b9a\u3057\u306a\u3044\u3068\u3044\u3046\u70b9\u3067\u3042\u308b\u3002\u3080\u3057\u308d\u3001\u540c\u3058 2.5-inch HDD\u3001\u540c\u3058 5400 rpm\u3001\u540c\u3058\u6700\u5927 140 MB\/s\u3001\u540c\u3058 SMR \u3068\u3044\u3046\u8868\u9762\u7684\u306a\u8fd1\u4f3c\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u7247\u65b9\u3060\u3051\u3067\u6027\u80fd\u554f\u984c\u304c\u51fa\u305f\u3053\u3068\u306f\u3001\u5916\u4ed8\u3051\u7b50\u4f53\u3001USB \u30d6\u30ea\u30c3\u30b8\u3001\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\u3001media cache\u3001\u5185\u90e8\u30c9\u30e9\u30a4\u30d6\u4e16\u4ee3\u3001\u30d7\u30e9\u30c3\u30bf\u30fc\u69cb\u6210\u3001\u71b1\u5236\u5fa1\u3001\u96fb\u6e90\u5236\u5fa1\u306e\u5dee\u304c\u52b9\u304f\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u308b\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u5bb9\u91cf\u968e\u5c64\u3068\u500b\u5225\u578b\u756a\u3092\u7121\u8996\u3057\u3066\u300c2.5-inch HDD\u300d\u3068\u4e00\u62ec\u308a\u306b\u3059\u308b\u306e\u306f\u4e0d\u5341\u5206\u3067\u3042\u308b\u3002<\/p>\n

\n

4. 2TB HDD \u3068 5TB HDD \u306e\u5dee\u3092\u5a92\u4f53\u8a2d\u8a08\u3068\u3057\u3066\u898b\u308b<\/h2>\n

Transcend StoreJet 25M3 \u306f\u3001\u8010\u885d\u6483\u69cb\u9020\u3068 USB 3.1 Gen 1 \u3092\u7279\u5fb4\u3068\u3059\u308b 2.5-inch \u5916\u4ed8\u3051 HDD \u3067\u3042\u308b[8]<\/a>\u3002\u88fd\u54c1\u8cc7\u6599\u3067\u306f 3 \u6bb5\u968e\u306e\u8010\u885d\u6483\u4fdd\u8b77\u3001\u30b7\u30ea\u30b3\u30f3\u30e9\u30d0\u30fc\u30b1\u30fc\u30b9\u3001\u5185\u90e8\u30b5\u30b9\u30da\u30f3\u30b7\u30e7\u30f3\u30c0\u30f3\u30d1\u30fc\u3001\u5f37\u5316\u7b50\u4f53\u3092\u7279\u5fb4\u3068\u3057\u3066\u304a\u308a\u3001\u8a2d\u8a08\u306e\u91cd\u70b9\u306f\u300c\u843d\u4e0b\u3084\u6301\u3061\u904b\u3073\u306b\u5bfe\u3059\u308b\u4fdd\u8b77\u300d\u3067\u3042\u308b[9]<\/a>\u3002\u4e00\u65b9\u3001\u8ca9\u58f2\u4ed5\u69d8\u60c5\u5831\u3067\u306f TS2TSJ25M3S 2TB \u304c 2.5-inch\u3001USB 3.2 Gen 1\u30015400 rpm \u3068\u3055\u308c\u3066\u3044\u308b[10]<\/a>\u3002\u3053\u306e\u5a92\u4f53\u306f\u3001\u5805\u7262\u306a\u6301\u3061\u904b\u3073\u7528\u9014\u3068\u3057\u3066\u306f\u5408\u7406\u7684\u3067\u3082\u3001LUKS + ext4 \u3067 TB \u7d1a\u306e\u5927\u91cf\u30d5\u30a1\u30a4\u30eb\u66f4\u65b0\u3092\u9577\u6642\u9593\u9023\u7d9a\u6295\u5165\u3059\u308b\u7528\u9014\u306b\u6700\u9069\u5316\u3055\u308c\u3066\u3044\u308b\u3068\u306f\u9650\u3089\u306a\u3044\u3002<\/p>\n\n\n\n\n\n\n\n\n\n
\u89b3\u70b9<\/th>\nTranscend StoreJet 25M3S 2TB<\/th>\nSeagate Expansion Portable 5TB<\/th>\n\u6027\u80fd\u5206\u6790\u4e0a\u306e\u610f\u5473<\/th>\n<\/tr>\n<\/thead>\n
\u5bb9\u91cf\u968e\u5c64<\/td>\n2TB<\/td>\n5TB<\/td>\n\u540c\u3058 2.5-inch \u3067\u3082\u5185\u90e8\u30c9\u30e9\u30a4\u30d6\u306e\u4e16\u4ee3\u3001\u539a\u307f\u3001\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u8a2d\u8a08\u304c\u7570\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/td>\n<\/tr>\n
\u7b50\u4f53\u539a<\/td>\n16.1 mm \u7a0b\u5ea6\u306e\u88fd\u54c1\u60c5\u5831\u304c\u6d41\u901a\u3057\u3066\u3044\u308b\u3002<\/td>\n20.9 mm \u3068\u3055\u308c\u308b\u3002<\/td>\n\u539a\u3044\u7b50\u4f53\u306f\u5185\u90e8\u30c9\u30e9\u30a4\u30d6\u3084\u71b1\u8a2d\u8a08\u306e\u4f59\u88d5\u304c\u7570\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/td>\n<\/tr>\n
\u56de\u8ee2\u6570<\/td>\n5400 rpm \u3068\u3055\u308c\u308b\u3002<\/td>\n\u5185\u8535\u30c9\u30e9\u30a4\u30d6\u306b\u3088\u308a\u7570\u306a\u308b\u304c\u30012.5-inch \u5927\u5bb9\u91cf HDD \u306f 5400 rpm \u7d1a\u304c\u591a\u3044\u3002<\/td>\n\u56de\u8ee2\u6570\u3060\u3051\u3067\u306f\u5dee\u3092\u8aac\u660e\u3067\u304d\u306a\u3044\u3002<\/td>\n<\/tr>\n
\u63a5\u7d9a<\/td>\nUSB 3.x Gen 1 \u7cfb<\/td>\nUSB 3.0<\/td>\n\u30d0\u30b9\u898f\u683c\u306e\u4e0a\u9650\u3088\u308a\u3001HDD \u5185\u90e8\u306e\u66f8\u304d\u8fbc\u307f\u6319\u52d5\u304c\u652f\u914d\u7684\u306b\u306a\u308b\u3002<\/td>\n<\/tr>\n
\u89b3\u6e2c\u7d50\u679c<\/td>\n\u6027\u80fd\u554f\u984c\u3042\u308a<\/td>\n\u6027\u80fd\u554f\u984c\u306a\u3057<\/td>\n\u5a92\u4f53\u500b\u4f53\u307e\u305f\u306f\u30e2\u30c7\u30eb\u56fa\u6709\u306e\u6319\u52d5\u3092\u691c\u8a3c\u5bfe\u8c61\u306b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

USB 3.0 \u3084 USB 3.1 Gen 1 \u306e\u516c\u79f0\u5e2f\u57df\u306f\u3001\u4eca\u56de\u306e\u4e3b\u56e0\u3067\u306f\u306a\u3044\u3002\u5916\u4ed8\u3051 HDD \u306e\u6700\u5927\u8ee2\u9001\u901f\u5ea6\u306f 100 MB\/s \u53f0\u3067\u3042\u308a\u3001USB 3.x Gen 1 \u306e\u30ea\u30f3\u30af\u5e2f\u57df\u306f\u305d\u308c\u3088\u308a\u5927\u304d\u3044\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u554f\u984c\u304c 10 MB\/s \u53f0\u304b\u3089\u6570\u5341 MB\/s \u53f0\u306e\u5b9f\u52b9\u901f\u5ea6\u3068\u3057\u3066\u73fe\u308c\u308b\u5834\u5408\u3001USB \u306e\u898f\u683c\u4e0a\u9650\u3067\u306f\u306a\u304f\u3001HDD \u5185\u90e8\u306e seek\u3001\u56de\u8ee2\u5f85\u3061\u3001SMR \u306e\u518d\u914d\u7f6e\u3001ext4 \u306e journal\u3001dm-crypt \u306e I\/O \u7d4c\u8def\u3001USB \u30d6\u30ea\u30c3\u30b8\u306e flush \u51e6\u7406\u3092\u7591\u3046\u3079\u304d\u3067\u3042\u308b\u3002<\/p>\n

\n

5. SMR \u306f\u7b2c\u4e00\u5bb9\u7591\u8005\u3060\u304c\u3001\u305d\u308c\u3060\u3051\u3067\u306f\u8aac\u660e\u3057\u306a\u3044<\/h2>\n

SMR \u306f\u3001\u8a18\u9332\u5bc6\u5ea6\u3092\u4e0a\u3052\u308b\u305f\u3081\u306b\u30c8\u30e9\u30c3\u30af\u3092\u74e6\u306e\u3088\u3046\u306b\u91cd\u306d\u308b\u65b9\u5f0f\u3067\u3042\u308b\u3002Western Digital \u306e SMR white paper \u306f\u3001drive-managed SMR \u304c\u5f93\u6765\u306e\u30d6\u30ed\u30c3\u30af\u30c7\u30d0\u30a4\u30b9\u3092\u30a8\u30df\u30e5\u30ec\u30fc\u30c8\u3057\u3066\u4e92\u63db\u6027\u3092\u4fdd\u3064\u4e00\u65b9\u3001\u7279\u5b9a\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u3067\u306f\u6027\u80fd\u304c\u4e88\u6e2c\u3057\u306b\u304f\u304f\u306a\u308b\u3068\u8aac\u660e\u3057\u3066\u3044\u308b[11]<\/a>\u3002Toshiba \u306e\u6280\u8853\u89e3\u8aac\u306f\u3001SMR \u306f CMR \u3068\u540c\u3058\u30e9\u30f3\u30c0\u30e0\u30a2\u30af\u30bb\u30b9\u6027\u80fd\u3092\u6301\u305f\u305a\u3001media cache \u3068 shingled band \u3092\u4f7f\u3044\u3001\u66f4\u65b0\u6642\u306b\u306f\u65e7\u30c7\u30fc\u30bf\u3068\u65b0\u30c7\u30fc\u30bf\u3092 merge \u3057\u3066\u65b0\u3057\u3044 band \u306b\u66f8\u304d\u623b\u3059\u69cb\u9020\u3092\u8aac\u660e\u3057\u3066\u3044\u308b[12]<\/a>\u3002\u307e\u305f Toshiba MQ04AB \u7cfb\u5217\u306f 2.5-inch\u30015400 rpm\u3001\u6700\u5927 2TB\u3001Drive-Managed SMR \u306e\u88fd\u54c1\u4f8b\u3068\u3057\u3066\u793a\u3055\u308c\u3066\u304a\u308a\u30012TB \u7d1a\u30e2\u30d0\u30a4\u30eb HDD \u3067 SMR \u3092\u7591\u3046\u3053\u3068\u306b\u306f\u5408\u7406\u6027\u304c\u3042\u308b[13]<\/a>\u3002<\/p>\n\n\n\n\n\n\n\n\n
SMR \u306e\u6027\u8cea<\/th>\n\u6027\u80fd\u554f\u984c\u3068\u3057\u3066\u306e\u610f\u5473<\/th>\nLUKS + ext4 \u3068\u306e\u95a2\u4fc2<\/th>\n<\/tr>\n<\/thead>\n
Drive-managed SMR<\/td>\nOS \u304b\u3089\u306f\u901a\u5e38 HDD \u306b\u898b\u3048\u308b\u305f\u3081\u3001\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306f SMR \u3092\u610f\u8b58\u3057\u306a\u3044\u3002<\/td>\next4 \u306f\u901a\u5e38\u306e\u30d6\u30ed\u30c3\u30af\u30c7\u30d0\u30a4\u30b9\u3068\u3057\u3066\u6271\u3044\u3001\u5185\u90e8\u306e\u518d\u914d\u7f6e\u30b3\u30b9\u30c8\u3092\u4e88\u6e2c\u3067\u304d\u306a\u3044\u3002<\/td>\n<\/tr>\n
Media cache<\/td>\n\u77ed\u6642\u9593\u306f\u66f8\u3051\u3066\u3082\u3001\u9577\u6642\u9593\u5927\u91cf\u66f8\u304d\u8fbc\u307f\u3067\u67af\u6e07\u3059\u308b\u3068\u5931\u901f\u3059\u308b\u3002<\/td>\n\u521d\u671f\u306f\u901f\u304f\u3001\u305d\u306e\u5f8c\u6025\u306b\u9045\u304f\u306a\u308b\u73fe\u8c61\u3068\u6574\u5408\u3059\u308b\u3002<\/td>\n<\/tr>\n
Band rewrite<\/td>\n\u5c0f\u3055\u3044\u66f4\u65b0\u304c\u5927\u304d\u3044\u5185\u90e8\u66f8\u304d\u63db\u3048\u306b\u5897\u5e45\u3055\u308c\u308b\u3002<\/td>\njournal\u3001directory\u3001inode\u3001mtime \u66f4\u65b0\u304c\u7d30\u304b\u3044\u66f8\u304d\u63db\u3048\u3092\u8a98\u767a\u3059\u308b\u3002<\/td>\n<\/tr>\n
Sequential preference<\/td>\n\u5b8c\u5168\u306a\u9806\u6b21\u6295\u5165\u3067\u306f\u6bd4\u8f03\u7684\u6709\u5229\u3060\u304c\u3001\u66f4\u65b0\u6df7\u5728\u3067\u5d29\u308c\u308b\u3002<\/td>\n\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u306f\u7dcf\u5bb9\u91cf\u304c\u5927\u304d\u304f\u3066\u3082\u30e1\u30bf\u30c7\u30fc\u30bf\u66f4\u65b0\u304c\u6df7\u3056\u308b\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u305f\u3060\u3057\u3001SMR \u3060\u3051\u3092\u5358\u72ec\u4e3b\u56e0\u306b\u3057\u3066\u306f\u3044\u3051\u306a\u3044\u3002Seagate BarraCuda 2.5-inch \u306e 5TB \u3068 2TB \u306f\u3001\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u4e0a\u306f\u3044\u305a\u308c\u3082 SMR \u3068\u3055\u308c\u308b[7]<\/a>\u3002\u305d\u308c\u306b\u3082\u304b\u304b\u308f\u3089\u305a 5TB \u3067\u306f\u554f\u984c\u304c\u9855\u8457\u3067\u306a\u304f\u30012TB \u3067\u306f\u9855\u8457\u3060\u3063\u305f\u3002\u3053\u306e\u305f\u3081\u3001SMR \u306f\u7b2c\u4e00\u5bb9\u7591\u8005\u3067\u306f\u3042\u308b\u304c\u3001SMR \u3067\u3042\u308b\u3053\u3068\u3060\u3051\u3067\u306f\u5dee\u3092\u8aac\u660e\u3067\u304d\u306a\u3044\u3002\u5b9f\u969b\u306b\u306f\u3001media cache \u306e\u5bb9\u91cf\u3068\u5236\u5fa1\u3001\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\u306e\u66f8\u304d\u8fbc\u307f\u6574\u7406\u3001USB \u30d6\u30ea\u30c3\u30b8\u306e flush \u4f1d\u64ad\u3001\u6e29\u5ea6\u5236\u5fa1\u3001\u500b\u4f53\u5dee\u3001\u7d4c\u5e74\u52a3\u5316\u3001\u5185\u90e8\u30c9\u30e9\u30a4\u30d6\u30e2\u30c7\u30eb\u304c\u91cd\u306a\u3063\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u9ad8\u3044\u3002<\/p>\n

\n

6. ext4 \u306f FAT \u3088\u308a\u91cd\u3044\u304c\u3001\u305d\u306e\u91cd\u3055\u306f\u8a2d\u8a08\u4e0a\u306e\u6a5f\u80fd\u3067\u3042\u308b<\/h2>\n

ext4 \u306f\u3001\u5358\u7d14\u306a\u30d5\u30a1\u30a4\u30eb\u7f6e\u304d\u5834\u3067\u306f\u306a\u304f\u3001Linux \u306e\u30cd\u30a4\u30c6\u30a3\u30d6\u306a\u30e1\u30bf\u30c7\u30fc\u30bf\u3001\u6574\u5408\u6027\u3001\u30af\u30e9\u30c3\u30b7\u30e5\u5fa9\u65e7\u3092\u652f\u3048\u308b\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3067\u3042\u308b\u3002Linux kernel documentation \u306f\u3001ext4 \u306e data=ordered \u3092\u6a19\u6e96\u306e journaling mode \u3068\u3057\u3001\u30e1\u30bf\u30c7\u30fc\u30bf\u304c journal \u306b commit \u3055\u308c\u308b\u524d\u306b\u95a2\u9023\u30c7\u30fc\u30bf\u3092 main filesystem \u3078\u66f8\u304d\u51fa\u3059\u3068\u8aac\u660e\u3057\u3066\u3044\u308b[14]<\/a>\u3002ext4 \u306e journal \u306f\u3001\u30af\u30e9\u30c3\u30b7\u30e5\u6642\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u4e0d\u6574\u5408\u3092\u9632\u3050\u305f\u3081\u306e\u9818\u57df\u3067\u3042\u308a\u3001\u91cd\u8981\u306a\u66f8\u304d\u8fbc\u307f\u3092\u4e00\u5ea6 journal \u306b\u7740\u5730\u3055\u305b\u308b[15]<\/a>\u3002\u307e\u305f ext4 \u306f delayed allocation \u3092\u4f7f\u3044\u3001dirty buffer \u304c\u66f8\u304d\u51fa\u3055\u308c\u308b\u6642\u70b9\u307e\u3067\u30d6\u30ed\u30c3\u30af\u5272\u308a\u5f53\u3066\u3092\u9045\u3089\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u9023\u7d9a\u3057\u305f\u914d\u7f6e\u3092\u72d9\u3046[16]<\/a>\u3002<\/p>\n\n\n\n\n\n\n\n\n\n
ext4 \u8981\u7d20<\/th>\n\u5b9a\u91cf\u307e\u305f\u306f\u4ed5\u69d8<\/th>\n\u6027\u80fd\u4e0a\u306e\u610f\u5473<\/th>\n<\/tr>\n<\/thead>\n
data=ordered<\/td>\n\u6a19\u6e96\u306e journaling mode<\/td>\n\u30e1\u30bf\u30c7\u30fc\u30bf commit \u524d\u306b\u95a2\u9023\u30c7\u30fc\u30bf\u306e\u66f8\u304d\u51fa\u3057\u9806\u5e8f\u3092\u5236\u5fa1\u3059\u308b\u3002<\/td>\n<\/tr>\n
commit interval<\/td>\n\u65e2\u5b9a\u5024\u306f 5 \u79d2<\/td>\n\u4e00\u5b9a\u9593\u9694\u3067\u30c7\u30fc\u30bf\u3068\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u540c\u671f\u304c\u767a\u751f\u3059\u308b\u3002<\/td>\n<\/tr>\n
journal<\/td>\n\u30e1\u30bf\u30c7\u30fc\u30bf\u4e0d\u6574\u5408\u3092\u9632\u3050\u305f\u3081\u306e\u9818\u57df<\/td>\nFAT \u306b\u306f\u306a\u3044\u8ffd\u52a0\u66f8\u304d\u8fbc\u307f\u304c\u767a\u751f\u3059\u308b\u3002<\/td>\n<\/tr>\n
delayed allocation<\/td>\n\u66f8\u304d\u623b\u3057\u6642\u307e\u3067\u30d6\u30ed\u30c3\u30af\u5272\u308a\u5f53\u3066\u3092\u9045\u5ef6<\/td>\n\u9023\u7d9a\u914d\u7f6e\u306b\u306f\u6709\u5229\u3060\u304c\u3001sync \u3084\u30e1\u30e2\u30ea\u30fc\u5727\u8feb\u3067\u4e00\u6c17\u306b\u66f8\u304d\u51fa\u3057\u304c\u767a\u751f\u3059\u308b\u3002<\/td>\n<\/tr>\n
inode \/ permission<\/td>\n\u30d5\u30a1\u30a4\u30eb\u3054\u3068\u306b\u7ba1\u7406<\/td>\n\u5c0f\u30d5\u30a1\u30a4\u30eb\u5927\u91cf\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3067\u306f\u30e1\u30bf\u30c7\u30fc\u30bf\u66f4\u65b0\u56de\u6570\u304c\u652f\u914d\u7684\u306b\u306a\u308b\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u3053\u306e\u91cd\u3055\u306f\u3001ext4 \u306e\u6b20\u9665\u3067\u306f\u306a\u3044\u3002FAT \u304c\u7701\u3044\u3066\u3044\u305f\u6574\u5408\u6027\u3001\u6240\u6709\u8005\u3001\u6a29\u9650\u3001inode\u3001journal\u3001barrier \u3092 ext4 \u304c\u6301\u3063\u3066\u3044\u308b\u305f\u3081\u306b\u767a\u751f\u3059\u308b\u30b3\u30b9\u30c8\u3067\u3042\u308b\u3002SSD \u3084 3.5-inch CMR HDD \u3067\u306f\u3053\u306e\u30b3\u30b9\u30c8\u3092\u8a31\u5bb9\u3067\u304d\u3066\u3082\u30012.5-inch 2TB HDD\u3001\u7279\u306b SMR \u3084\u4f4e IOPS \u304c\u91cd\u306a\u308b\u5a92\u4f53\u3067\u306f\u3001journal \u3068\u30e1\u30bf\u30c7\u30fc\u30bf\u66f4\u65b0\u304c\u8868\u9762\u5316\u3059\u308b\u3002\u3064\u307e\u308a\u3001TrueCrypt + FAT \u304c\u8efd\u304b\u3063\u305f\u306e\u306f\u3001\u65e7\u69cb\u6210\u304c\u4fdd\u6301\u3057\u3066\u3044\u306a\u3044\u60c5\u5831\u304c\u591a\u304b\u3063\u305f\u304b\u3089\u3067\u3042\u308a\u3001LUKS + ext4 \u304c\u9045\u304f\u306a\u3063\u305f\u306e\u306f\u3001\u4fdd\u6301\u3059\u3079\u304d\u60c5\u5831\u3068\u6574\u5408\u6027\u304c\u5897\u3048\u305f\u304b\u3089\u3067\u3042\u308b\u3002<\/p>\n

\n

7. journal\u3001barrier\u3001commit \u306f HDD \u3067\u5f85\u3061\u6642\u9593\u3068\u3057\u3066\u898b\u3048\u308b<\/h2>\n

ext4 \u306e barrier \u306f\u3001\u66f8\u304d\u8fbc\u307f\u9806\u5e8f\u3092\u5b88\u308b\u305f\u3081\u306e\u4ed5\u7d44\u307f\u3067\u3042\u308a\u3001man page \u3067\u306f ext4 \u304c write barrier \u3092\u65e2\u5b9a\u3067\u6709\u52b9\u306b\u3059\u308b\u3068\u8aac\u660e\u3055\u308c\u3066\u3044\u308b[17]<\/a>\u3002\u3053\u306e\u6a5f\u69cb\u306f\u3001\u63ee\u767a\u6027 write cache \u3092\u6301\u3064\u30c7\u30a3\u30b9\u30af\u3067\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u9806\u5e8f\u3092\u5b88\u308b\u305f\u3081\u306b\u306f\u91cd\u8981\u3067\u3042\u308b\u3002\u3057\u304b\u3057\u3001HDD \u3067\u306f\u66f8\u304d\u8fbc\u307f\u9806\u5e8f\u4fdd\u8a3c\u3001flush\u3001journal commit \u304c\u7269\u7406\u7684\u306a\u5f85\u3061\u6642\u9593\u3068\u3057\u3066\u898b\u3048\u3084\u3059\u3044\u3002\u3068\u304f\u306b 5400 rpm HDD \u3067\u306f\u3001seek \u3068\u56de\u8ee2\u5f85\u3061\u304c SSD \u3088\u308a\u5927\u304d\u304f\u3001\u7d30\u304b\u3044\u540c\u671f\u70b9\u304c\u5897\u3048\u308b\u307b\u3069\u5f85\u3061\u6642\u9593\u304c\u7d2f\u7a4d\u3059\u308b\u3002<\/p>\n\n\n\n\n\n\n\n\n
\u6a5f\u69cb<\/th>\n\u5b89\u5168\u6027\u3078\u306e\u52b9\u679c<\/th>\n2.5-inch HDD \u3067\u306e\u526f\u4f5c\u7528<\/th>\n<\/tr>\n<\/thead>\n
journal commit<\/td>\n\u30e1\u30bf\u30c7\u30fc\u30bf\u66f4\u65b0\u3092\u4e00\u8cab\u3057\u305f\u5358\u4f4d\u3068\u3057\u3066\u78ba\u5b9a\u3059\u308b\u3002<\/td>\n\u4e00\u5b9a\u9593\u9694\u3067\u66f8\u304d\u8fbc\u307f\u5f85\u3061\u304c\u767a\u751f\u3059\u308b\u3002<\/td>\n<\/tr>\n
write barrier<\/td>\n\u30c7\u30a3\u30b9\u30af\u3078\u306e\u5230\u9054\u9806\u5e8f\u3092\u5236\u5fa1\u3059\u308b\u3002<\/td>\nHDD \u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3084\u4e26\u3079\u66ff\u3048\u81ea\u7531\u5ea6\u3092\u5236\u9650\u3059\u308b\u3002<\/td>\n<\/tr>\n
flush<\/td>\n\u63ee\u767a\u6027\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u6b8b\u308b\u30c7\u30fc\u30bf\u3092\u5a92\u4f53\u3078\u62bc\u3057\u51fa\u3059\u3002<\/td>\nUSB \u30d6\u30ea\u30c3\u30b8\u3084 SMR firmware \u3092\u5dfb\u304d\u8fbc\u3093\u3060\u5f85\u3061\u306b\u306a\u308b\u3002<\/td>\n<\/tr>\n
metadata update<\/td>\n\u6240\u6709\u8005\u3001\u6a29\u9650\u3001\u30b5\u30a4\u30ba\u3001\u6642\u523b\u3001\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u6574\u5408\u3055\u305b\u308b\u3002<\/td>\n\u30d5\u30a1\u30a4\u30eb\u6570\u304c\u591a\u3044\u307b\u3069 IOPS \u652f\u914d\u306b\u306a\u308b\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u3053\u306e\u7ae0\u3067\u306e\u91cd\u8981\u70b9\u306f\u3001\u901f\u5ea6\u4f4e\u4e0b\u306e\u4e00\u90e8\u306f\u300c\u60aa\u3044\u9045\u3055\u300d\u3067\u306f\u306a\u304f\u300c\u5b89\u5168\u6027\u306e\u305f\u3081\u306e\u9045\u3055\u300d\u3060\u3068\u3044\u3046\u3053\u3068\u3067\u3042\u308b\u3002\u305f\u3060\u3057\u3001\u904b\u7528\u4e0a\u306f\u5b89\u5168\u6027\u306e\u305f\u3081\u306a\u3089\u3044\u304f\u3089\u9045\u304f\u3066\u3082\u3088\u3044\u3001\u3068\u306f\u306a\u3089\u306a\u3044\u300224 \u6642\u9593\u4ee5\u4e0a\u304b\u304b\u308b\u3001\u65e5\u6b21\u904b\u7528\u306b\u4e57\u3089\u306a\u3044\u3001\u66f4\u65b0\u304c\u7d42\u308f\u3089\u306a\u3044\u3001\u30ed\u30b0\u304c\u80a5\u5927\u5316\u3059\u308b\u3001\u5a92\u4f53\u3092\u9577\u6642\u9593\u63a5\u7d9a\u3057\u7d9a\u3051\u308b\u5fc5\u8981\u304c\u3042\u308b\u3068\u3044\u3046\u72b6\u614b\u306f\u3001\u5fa9\u5143\u53ef\u80fd\u6027\u306e\u8a2d\u8a08\u3068\u3057\u3066\u5931\u6557\u3067\u3042\u308b\u3002\u5b89\u5168\u306a\u69cb\u6210\u3067\u3042\u3063\u3066\u3082\u3001\u904b\u7528\u53ef\u80fd\u3067\u306a\u3051\u308c\u3070\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3068\u3057\u3066\u306f\u4e0d\u5341\u5206\u3067\u3042\u308b\u3002<\/p>\n

\n

8. mkfs.ext4 \u76f4\u5f8c\u306e\u521d\u56de\u5927\u91cf\u6295\u5165\u306f\u60aa\u6761\u4ef6\u306b\u306a\u308a\u5f97\u308b<\/h2>\n

mke2fs \u306e man page \u306f\u3001lazy_itable_init \u304c\u6709\u52b9\u3067 uninit_bg feature \u304c\u6709\u52b9\u306a\u5834\u5408\u3001inode table \u306f mke2fs \u6642\u70b9\u3067\u306f\u5b8c\u5168\u306b\u306f\u521d\u671f\u5316\u3055\u308c\u305a\u3001\u6700\u521d\u306b\u30de\u30a6\u30f3\u30c8\u3055\u308c\u305f\u3068\u304d\u306b kernel \u304c\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u3067\u521d\u671f\u5316\u3092\u5b8c\u4e86\u3059\u308b\u3068\u8aac\u660e\u3057\u3066\u3044\u308b[18]<\/a>\u3002mke2fs.conf \u306e man page \u3082\u3001lazy_itable_init \u304c true \u306e\u5834\u5408\u306b inode table \u304c\u5b8c\u5168\u306b\u306f\u521d\u671f\u5316\u3055\u308c\u305a\u3001\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u521d\u671f\u5316\u304c\u901f\u304f\u306a\u308b\u4e00\u65b9\u3067 kernel \u306b\u3088\u308b\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u521d\u671f\u5316\u304c\u5fc5\u8981\u306b\u306a\u308b\u3068\u8aac\u660e\u3057\u3066\u3044\u308b[19]<\/a>\u3002<\/p>\n\n\n\n\n\n\n\n\n
\u72b6\u614b<\/th>\n\u5185\u90e8\u51e6\u7406<\/th>\n\u6027\u80fd\u4e0a\u306e\u610f\u5473<\/th>\n<\/tr>\n<\/thead>\n
mkfs.ext4 \u76f4\u5f8c<\/td>\ninode table \u521d\u671f\u5316\u304c\u6b8b\u3063\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/td>\n\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u4f5c\u6210\u306f\u901f\u3044\u304c\u3001\u521d\u56de\u5229\u7528\u6642\u306b\u8ffd\u52a0 I\/O \u304c\u6b8b\u308b\u3002<\/td>\n<\/tr>\n
\u521d\u56de\u30de\u30a6\u30f3\u30c8\u76f4\u5f8c<\/td>\nkernel \u304c\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u521d\u671f\u5316\u3092\u9032\u3081\u308b\u3002<\/td>\n\u30e6\u30fc\u30b6\u30fc\u306e\u30b3\u30d4\u30fc\u51e6\u7406\u3068\u5185\u90e8\u521d\u671f\u5316\u304c\u7af6\u5408\u3059\u308b\u3002<\/td>\n<\/tr>\n
TB \u7d1a\u5927\u91cf\u6295\u5165<\/td>\n\u30c7\u30fc\u30bf\u66f8\u304d\u8fbc\u307f\u3001inode \u4f5c\u6210\u3001directory \u66f4\u65b0\u304c\u540c\u6642\u306b\u767a\u751f\u3059\u308b\u3002<\/td>\nHDD \u3067\u306f seek \u3068\u56de\u8ee2\u5f85\u3061\u304c\u5897\u3048\u3001SMR \u3067\u306f\u518d\u914d\u7f6e\u304c\u91cd\u306a\u308b\u3002<\/td>\n<\/tr>\n
2.5-inch 2TB HDD<\/td>\n\u4f4e IOPS\u3001\u4f4e\u96fb\u529b\u8a2d\u8a08\u3001USB \u63a5\u7d9a\u304c\u91cd\u306a\u308b\u3002<\/td>\n\u521d\u56de\u6295\u5165\u3067\u6700\u60aa\u6761\u4ef6\u304c\u63c3\u3046\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u3053\u306e\u8981\u56e0\u306f\u30015TB HDD \u3067\u554f\u984c\u304c\u51fa\u306a\u304b\u3063\u305f\u4e8b\u5b9f\u3068\u3082\u77db\u76fe\u3057\u306a\u3044\u30025TB \u5a92\u4f53\u3067\u306f firmware\u3001media cache\u3001\u71b1\u5236\u5fa1\u3001USB \u30d6\u30ea\u30c3\u30b8\u3001\u5185\u90e8\u30c9\u30e9\u30a4\u30d6\u306e\u72b6\u614b\u304c\u521d\u56de\u6295\u5165\u306b\u8010\u3048\u305f\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002\u4e00\u65b9\u30012TB \u5a92\u4f53\u3067\u306f\u3001mkfs.ext4 \u76f4\u5f8c\u306e\u521d\u56de\u5927\u91cf\u6295\u5165\u3068 ext4 \u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u66f4\u65b0\u304c\u3001\u5a92\u4f53\u5074\u306e\u5f31\u70b9\u3092\u9732\u51fa\u3055\u305b\u305f\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u4eca\u5f8c\u540c\u69d8\u306e\u691c\u8a3c\u3092\u3059\u308b\u306a\u3089\u3001mkfs.ext4 \u76f4\u5f8c\u306b\u3059\u3050\u5168\u91cf\u6295\u5165\u3059\u308b\u6761\u4ef6\u3068\u3001\u3057\u3070\u3089\u304f idle \u3092\u7f6e\u3044\u305f\u5f8c\u306b\u6295\u5165\u3059\u308b\u6761\u4ef6\u3092\u5206\u3051\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n

\n

9. LUKS \/ dm-crypt \u306f\u8981\u56e0\u3060\u304c\u3001\u5358\u72ec\u4e3b\u56e0\u3067\u306f\u306a\u3044<\/h2>\n

dm-crypt \u306f Linux \u306e device-mapper target \u3068\u3057\u3066\u3001\u30d6\u30ed\u30c3\u30af\u30c7\u30d0\u30a4\u30b9\u6697\u53f7\u5316\u3092\u900f\u904e\u7684\u306b\u63d0\u4f9b\u3059\u308b\u3002kernel documentation \u306b\u306f\u3001same_cpu_crypt\u3001submit_from_crypt_cpus\u3001no_read_workqueue\u3001no_write_workqueue\u3001high_priority \u306a\u3069\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u304c\u8aac\u660e\u3055\u308c\u3066\u304a\u308a\u3001\u6697\u53f7\u51e6\u7406\u3060\u3051\u3067\u306a\u304f I\/O \u306e\u30ad\u30e5\u30fc\u30a4\u30f3\u30b0\u3084 CPU \u914d\u7f6e\u304c\u6027\u80fd\u306b\u5f71\u97ff\u3057\u5f97\u308b\u3053\u3068\u304c\u5206\u304b\u308b[20]<\/a>\u3002Cloudflare \u306e\u5b9f\u9a13\u3067\u3082\u3001Linux disk encryption \u306e\u6027\u80fd\u306f\u5358\u7d14\u306a\u6697\u53f7\u6f14\u7b97\u901f\u5ea6\u3060\u3051\u3067\u306f\u306a\u304f\u3001kernel crypto API\u3001workqueue\u3001I\/O \u7d4c\u8def\u306e\u69cb\u9020\u306b\u5f71\u97ff\u3055\u308c\u3001\u5c11\u306a\u304f\u3068\u3082\u7279\u5b9a\u74b0\u5883\u3067\u306f\u5927\u304d\u306a\u6539\u5584\u4f59\u5730\u304c\u3042\u3063\u305f\u3068\u5831\u544a\u3055\u308c\u3066\u3044\u308b[21]<\/a>\u3002<\/p>\n\n\n\n\n\n\n\n\n
dm-crypt \u8981\u7d20<\/th>\n\u6027\u80fd\u3078\u306e\u95a2\u4fc2<\/th>\n\u4eca\u56de\u306e\u8a55\u4fa1<\/th>\n<\/tr>\n<\/thead>\n
\u6697\u53f7\u6f14\u7b97<\/td>\nAES-NI \u304c\u3042\u308c\u3070 HDD \u3088\u308a\u901f\u3044\u53ef\u80fd\u6027\u304c\u9ad8\u3044\u3002<\/td>\n\u4e3b\u56e0\u3068\u6c7a\u3081\u3064\u3051\u308b\u6839\u62e0\u306f\u5f31\u3044\u3002<\/td>\n<\/tr>\n
workqueue<\/td>\nI\/O \u304c\u8ffd\u52a0\u30ad\u30e5\u30fc\u3092\u901a\u308b\u3053\u3068\u3067 latency \u304c\u5897\u3048\u308b\u5834\u5408\u304c\u3042\u308b\u3002<\/td>\nHDD \u3067\u3082\u5f71\u97ff\u3057\u5f97\u308b\u304c\u3001SSD \u3067\u6df1\u523b\u5316\u3057\u306a\u3044\u306a\u3089\u5358\u72ec\u4e3b\u56e0\u3067\u306f\u306a\u3044\u3002<\/td>\n<\/tr>\n
flush \u4f1d\u64ad<\/td>\next4 \u306e barrier \/ flush \u304c\u6697\u53f7\u5316\u5c64\u3092\u901a\u3063\u3066\u4e0b\u5c64\u3078\u4f1d\u308f\u308b\u3002<\/td>\njournal \u3068 HDD \u306e\u5f85\u3061\u3092\u5897\u5e45\u3057\u3046\u308b\u3002<\/td>\n<\/tr>\n
sector size<\/td>\n512e \/ 4Kn \/ LUKS sector size \u306e\u4e0d\u4e00\u81f4\u304c\u52b9\u304f\u5834\u5408\u304c\u3042\u308b\u3002<\/td>\n\u5b9f\u6a5f\u78ba\u8a8d\u304c\u5fc5\u8981\u3067\u3001\u63a8\u5b9a\u3060\u3051\u3067\u306f\u65ad\u5b9a\u3067\u304d\u306a\u3044\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

cryptsetup benchmark \u306e\u6271\u3044\u306b\u3082\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3042\u308b\u3002cryptsetup-benchmark \u306e man page \u306f\u3001\u3053\u306e benchmark \u304c memory only \u3067\u3042\u308a\u3001\u5b9f\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u6697\u53f7\u5316\u901f\u5ea6\u3092\u76f4\u63a5\u4e88\u6e2c\u3067\u304d\u306a\u3044\u3068\u660e\u8a18\u3057\u3066\u3044\u308b[22]<\/a>\u3002cryptsetup \u81ea\u4f53\u306f\u3001\u6697\u53f7\u5316\u30c7\u30d0\u30a4\u30b9\u3092\u958b\u304f\u3068 kernel \u306e dm-crypt driver \u304c\u900f\u904e\u7684\u306b\u6697\u53f7\u5316 \/ \u5fa9\u53f7\u3092\u884c\u3046\u69cb\u9020\u3067\u3042\u308b[23]<\/a>\u3002\u3057\u305f\u304c\u3063\u3066\u3001cryptsetup benchmark \u304c\u5341\u5206\u901f\u304f\u3066\u3082\u3001ext4 journal\u3001HDD\u3001SMR\u3001USB bridge\u3001flush \u304c\u7d61\u3080\u5b9f\u30b3\u30d4\u30fc\u304c\u901f\u3044\u3068\u306f\u9650\u3089\u306a\u3044\u3002\u9006\u306b\u3001\u5b9f\u30b3\u30d4\u30fc\u304c\u9045\u3044\u304b\u3089\u3068\u3044\u3063\u3066\u3001\u6697\u53f7\u6f14\u7b97\u305d\u306e\u3082\u306e\u304c\u9045\u3044\u3068\u3082\u9650\u3089\u306a\u3044\u3002<\/p>\n

\n

10. FAT \u304c\u8efd\u304b\u3063\u305f\u7406\u7531\u3092\u6027\u80fd\u9762\u3060\u3051\u3067\u8aac\u660e\u3059\u308b<\/h2>\n

FAT \u306f\u3001MS-DOS \u7531\u6765\u306e\u5358\u7d14\u3067\u4e92\u63db\u6027\u306e\u9ad8\u3044\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3067\u3042\u308a\u3001Linux \u30cd\u30a4\u30c6\u30a3\u30d6\u306a owner\u3001group\u3001permission\u3001inode\u3001journal\u3001xattr\u3001ACL \u3092\u672c\u8cea\u7684\u306b\u6301\u305f\u306a\u3044\u3002Microsoft \u306e FAT32 specification \u306f FAT \u3092\u53e4\u3044\u8a2d\u8a08\u7cfb\u8b5c\u306b\u4f4d\u7f6e\u3065\u3051\u3001FAT \u9818\u57df\u3067 cluster chain \u3092\u7ba1\u7406\u3059\u308b\u69cb\u9020\u3092\u8aac\u660e\u3057\u3066\u3044\u308b[24]<\/a>\u3002\u307e\u305f exFAT \u4ed5\u69d8\u3067\u3082\u3001FAT \u306f cluster chain \u3092 singly-linked list \u3068\u3057\u3066\u8868\u3059\u69cb\u9020\u3068\u3057\u3066\u8aac\u660e\u3055\u308c\u308b[25]<\/a>\u3002<\/p>\n\n\n\n\n\n\n\n\n
FAT \u306e\u7279\u5fb4<\/th>\n\u6027\u80fd\u4e0a\u306e\u8efd\u3055<\/th>\n\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u4e0a\u306e\u4ee3\u511f<\/th>\n<\/tr>\n<\/thead>\n
journal \u306a\u3057<\/td>\njournal \u66f8\u304d\u8fbc\u307f\u304c\u306a\u3044\u3002<\/td>\n\u30af\u30e9\u30c3\u30b7\u30e5\u6642\u306e\u6574\u5408\u6027\u56de\u5fa9\u80fd\u529b\u306f ext4 \u3088\u308a\u5f31\u3044\u3002<\/td>\n<\/tr>\n
Unix metadata \u306a\u3057<\/td>\nowner\u3001group\u3001mode \u306e\u66f4\u65b0\u304c\u306a\u3044\u3002<\/td>\nLinux \u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3068\u3057\u3066\u306e\u60c5\u5831\u4fdd\u5b58\u80fd\u529b\u306f\u843d\u3061\u308b\u3002<\/td>\n<\/tr>\n
inode \u306a\u3057<\/td>\next4 \u7684\u306a inode \u7ba1\u7406\u304c\u306a\u3044\u3002<\/td>\nLinux \u306e\u30d5\u30a1\u30a4\u30eb\u5c5e\u6027\u3092\u5b8c\u5168\u306b\u306f\u4fdd\u6301\u3067\u304d\u306a\u3044\u3002<\/td>\n<\/tr>\n
\u5358\u7d14\u306a cluster chain<\/td>\n\u69cb\u9020\u304c\u5358\u7d14\u3067\u66f8\u304d\u8fbc\u307f\u7d4c\u8def\u304c\u8efd\u3044\u3002<\/td>\n\u5927\u91cf\u30d5\u30a1\u30a4\u30eb\u3001\u6a29\u9650\u3001\u6574\u5408\u6027\u306e\u6271\u3044\u306f\u9650\u5b9a\u7684\u3067\u3042\u308b\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u3057\u305f\u304c\u3063\u3066\u3001TrueCrypt + FAT \u304c\u901f\u304b\u3063\u305f\u3053\u3068\u3092\u3001\u300cTrueCrypt \u304c LUKS \u3088\u308a\u901f\u3044\u300d\u3068\u8aad\u3080\u306e\u306f\u5371\u967a\u3067\u3042\u308b\u3002\u65e7\u69cb\u6210\u3067\u306f FAT \u304c\u8efd\u304b\u3063\u305f\u53ef\u80fd\u6027\u304c\u5927\u304d\u3044\u3002FAT \u306f\u4fdd\u6301\u3057\u3066\u3044\u306a\u3044\u60c5\u5831\u304c\u591a\u304f\u3001journal \u306b\u3088\u308b\u6574\u5408\u6027\u4fdd\u8b77\u3082\u306a\u304f\u3001Linux \u306e\u6a29\u9650\u30e2\u30c7\u30eb\u3082\u81ea\u7136\u306b\u306f\u4fdd\u6301\u3057\u306a\u3044\u3002\u3053\u306e\u305f\u3081\u30012.5-inch HDD \u306e\u5f31\u70b9\u3092\u9732\u51fa\u3055\u305b\u306b\u304f\u304b\u3063\u305f\u3002\u4e00\u65b9\u3001LUKS + ext4 \u306f\u3001\u6697\u53f7\u5316\u306e\u5b89\u5168\u6027\u3001Linux \u30cd\u30a4\u30c6\u30a3\u30d6\u306a\u30e1\u30bf\u30c7\u30fc\u30bf\u3001journal\u3001\u6a29\u9650\u3001\u5fa9\u65e7\u53ef\u80fd\u6027\u3092\u5f97\u308b\u4ee3\u308f\u308a\u306b\u3001\u66f8\u304d\u8fbc\u307f\u306e\u5bc6\u5ea6\u3068\u9806\u5e8f\u4fdd\u8a3c\u3092\u5a92\u4f53\u3078\u8981\u6c42\u3059\u308b\u3002\u3053\u3053\u306b\u3001\u6027\u80fd\u4e0a\u306e\u8ca0\u50b5\u304c\u3042\u308b\u3002<\/p>\n

\n

11. \u7dcf\u5bb9\u91cf\u3067\u306f\u306a\u304f\u3001\u30d5\u30a1\u30a4\u30eb\u6570\u3068\u30e1\u30bf\u30c7\u30fc\u30bf\u66f4\u65b0\u56de\u6570\u304c\u52b9\u304f<\/h2>\n

\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u6027\u80fd\u3092\u5bb9\u91cf\u3060\u3051\u3067\u898b\u308b\u3068\u8aa4\u308b\u30021TB \u306e\u5927\u304d\u306a\u5358\u4e00\u30d5\u30a1\u30a4\u30eb\u3092\u66f8\u304d\u8fbc\u3080\u51e6\u7406\u3068\u30011TB \u5206\u306e\u5c0f\u30d5\u30a1\u30a4\u30eb\u3092\u6570\u5341\u4e07\u500b\u66f8\u304d\u8fbc\u3080\u51e6\u7406\u306f\u3001\u540c\u3058 1TB \u3067\u3082 HDD \u306b\u5bfe\u3059\u308b\u8ca0\u8377\u304c\u307e\u3063\u305f\u304f\u9055\u3046\u3002\u524d\u8005\u306f\u6bd4\u8f03\u7684\u30b7\u30fc\u30b1\u30f3\u30b7\u30e3\u30eb\u3067\u3042\u308a\u3001\u5f8c\u8005\u306f inode \u4f5c\u6210\u3001directory \u66f4\u65b0\u3001mtime \u66f4\u65b0\u3001journal commit\u3001barrier\u3001flush \u3092\u5927\u91cf\u306b\u767a\u751f\u3055\u305b\u308b\u3002SMART \u306f\u5a92\u4f53\u306e\u4fe1\u983c\u6027\u3084\u81ea\u5df1\u8a3a\u65ad\u3092\u8aad\u3080\u305f\u3081\u306b\u6709\u7528\u3060\u304c\u3001SMART \u304c\u6b63\u5e38\u3067\u3042\u308b\u3053\u3068\u306f\u3001\u5c0f\u30d5\u30a1\u30a4\u30eb\u5927\u91cf\u66f8\u304d\u8fbc\u307f\u304c\u901f\u3044\u3053\u3068\u3092\u610f\u5473\u3057\u306a\u3044[26]<\/a>\u3002<\/p>\n

\u5b9a\u91cf\u5316\u306e\u57fa\u672c\u5f0f\u306f\u5358\u7d14\u3067\u3042\u308b\u3002\u5b9f\u52b9\u8ee2\u9001\u901f\u5ea6\u306f\u3001\u30b3\u30d4\u30fc\u5bfe\u8c61\u7dcf\u5bb9\u91cf\u3092\u7d4c\u904e\u79d2\u6570\u3067\u5272\u3063\u3066\u6c42\u3081\u308b\u3002<\/p>\n

\n\\[
\nv = \\frac{S}{t}
\n\\]\n<\/div>\n\n\n\n\n\n\n\n\n
\u6295\u5165\u91cf<\/th>\n\u7d4c\u904e\u6642\u9593<\/th>\n\u5b9f\u52b9\u901f\u5ea6<\/th>\n\u516c\u79f0 140 MB\/s \u3068\u306e\u6bd4\u8f03<\/th>\n<\/tr>\n<\/thead>\n
1TB<\/td>\n24 \u6642\u9593<\/td>\n\u7d04 11.6 MB\/s<\/td>\n\u7d04 8.3% \u306b\u4f4e\u4e0b\u3057\u3066\u3044\u308b\u3002<\/td>\n<\/tr>\n
2TB<\/td>\n24 \u6642\u9593<\/td>\n\u7d04 23.1 MB\/s<\/td>\n\u7d04 16.5% \u306b\u4f4e\u4e0b\u3057\u3066\u3044\u308b\u3002<\/td>\n<\/tr>\n
2TB<\/td>\n36 \u6642\u9593<\/td>\n\u7d04 15.4 MB\/s<\/td>\n\u7d04 11.0% \u306b\u4f4e\u4e0b\u3057\u3066\u3044\u308b\u3002<\/td>\n<\/tr>\n
2TB<\/td>\n48 \u6642\u9593<\/td>\n\u7d04 11.6 MB\/s<\/td>\n\u7d04 8.3% \u306b\u4f4e\u4e0b\u3057\u3066\u3044\u308b\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u3053\u3053\u3067\u306e\u6bd4\u8f03\u306f\u30012.5-inch HDD \u306e\u6700\u5927 140 MB\/s \u3092\u5b9f\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u901f\u5ea6\u306e\u671f\u5f85\u5024\u306b\u3059\u308b\u305f\u3081\u3067\u306f\u306a\u3044\u3002\u3080\u3057\u308d\u3001\u5b9f\u52b9\u901f\u5ea6\u304c 10 MB\/s \u53f0\u306b\u843d\u3061\u308b\u5834\u5408\u3001\u305d\u308c\u306f USB 3.x \u306e\u898f\u683c\u4e0a\u9650\u3067\u306f\u306a\u304f\u3001HDD \u306e IOPS\u3001SMR \u306e cache \u67af\u6e07\u3001ext4 metadata\u3001journal commit\u3001barrier\u3001dm-crypt \u7d4c\u8def\u3001\u521d\u56de\u521d\u671f\u5316\u306e\u8907\u5408\u3060\u3068\u63a8\u5b9a\u3059\u308b\u305f\u3081\u306e\u57fa\u6e96\u3067\u3042\u308b\u3002fio \u306f random read \/ random write \u306a\u3069\u306e I\/O \u30d1\u30bf\u30fc\u30f3\u3092\u6307\u5b9a\u3057\u3066\u30c6\u30b9\u30c8\u3067\u304d\u308b\u30c4\u30fc\u30eb\u3067\u3042\u308a\u3001fio documentation \u306f write \/ randwrite \/ rw \/ randrw \u306a\u3069\u3092\u660e\u793a\u7684\u306b\u6307\u5b9a\u3057\u305f\u3068\u304d\u306b\u30c7\u30d0\u30a4\u30b9\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u3092\u8aac\u660e\u3057\u3066\u3044\u308b[27]<\/a>\u3002Oracle \u306e\u4f8b\u3067\u3082\u3001IOPS \u6e2c\u5b9a\u3068\u3057\u3066 4K random read\u3001direct I\/O\u3001iodepth\u3001runtime \u306a\u3069\u3092\u6307\u5b9a\u3059\u308b\u5f62\u304c\u793a\u3055\u308c\u3066\u3044\u308b[28]<\/a>\u3002\u307e\u305f hdparm \u306e -t \u306f\u3001\u4e8b\u524d\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u3066\u3044\u306a\u3044\u30c7\u30fc\u30bf\u3092\u30c7\u30a3\u30b9\u30af\u304b\u3089 buffer cache \u7d4c\u7531\u3067\u8aad\u3080\u901f\u5ea6\u306e\u76ee\u5b89\u3092\u793a\u3059\u304c\u3001\u610f\u5473\u306e\u3042\u308b\u7d50\u679c\u306b\u306f inactive \u306a\u72b6\u614b\u3067\u8907\u6570\u56de\u5b9f\u884c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b[29]<\/a>\u3002<\/p>\n\n\n\n\n\n\n\n\n\n\n
\u6e2c\u5b9a\u5bfe\u8c61<\/th>\n\u53d6\u5f97\u3059\u308b\u5024<\/th>\n\u5207\u308a\u5206\u3051\u3089\u308c\u308b\u8981\u56e0<\/th>\n<\/tr>\n<\/thead>\n
\u7dcf\u5bb9\u91cf<\/td>\n\u5bfe\u8c61\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u5408\u8a08\u30b5\u30a4\u30ba<\/td>\n\u5b9f\u52b9 MB\/s \u3092\u8a08\u7b97\u3067\u304d\u308b\u3002<\/td>\n<\/tr>\n
\u30d5\u30a1\u30a4\u30eb\u6570<\/td>\n\u901a\u5e38\u30d5\u30a1\u30a4\u30eb\u306e\u4ef6\u6570<\/td>\ninode \u3068 metadata \u66f4\u65b0\u56de\u6570\u3092\u63a8\u5b9a\u3067\u304d\u308b\u3002<\/td>\n<\/tr>\n
\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u6570<\/td>\n\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u4ef6\u6570<\/td>\ndirectory metadata \u66f4\u65b0\u91cf\u3092\u63a8\u5b9a\u3067\u304d\u308b\u3002<\/td>\n<\/tr>\n
\u5e73\u5747\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba<\/td>\n\u7dcf\u5bb9\u91cf \u00f7 \u30d5\u30a1\u30a4\u30eb\u6570<\/td>\n\u5927\u30d5\u30a1\u30a4\u30eb\u652f\u914d\u304b\u5c0f\u30d5\u30a1\u30a4\u30eb\u652f\u914d\u304b\u3092\u5224\u5b9a\u3067\u304d\u308b\u3002<\/td>\n<\/tr>\n
\u751f\u30d6\u30ed\u30c3\u30af\u901f\u5ea6<\/td>\n\u6697\u53f7\u5316\u5c64\u306a\u3057\u3001\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306a\u3057\u306e\u901f\u5ea6<\/td>\n\u5a92\u4f53\u81ea\u4f53\u306e\u9010\u6b21\u6027\u80fd\u3092\u898b\u3089\u308c\u308b\u3002<\/td>\n<\/tr>\n
\u5c0f\u30d6\u30ed\u30c3\u30af random write<\/td>\n4K random write IOPS<\/td>\nmetadata \/ journal \/ SMR \u306b\u8fd1\u3044\u5f31\u70b9\u3092\u898b\u3089\u308c\u308b\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

12. \u8981\u56e0\u5225\u30e1\u30bf\u30a2\u30ca\u30ea\u30b7\u30b9<\/h2>\n

\u3053\u3053\u307e\u3067\u306e\u60c5\u5831\u3092\u7d71\u5408\u3059\u308b\u3068\u3001\u4eca\u56de\u306e\u6027\u80fd\u554f\u984c\u306f\u3001LUKS \u5358\u72ec\u3001ext4 \u5358\u72ec\u3001SMR \u5358\u72ec\u3001HDD \u5358\u72ec\u306e\u3069\u308c\u304b\u4e00\u3064\u3067\u306f\u306a\u304f\u3001\u8907\u6570\u306e\u5c64\u304c\u91cd\u306a\u3063\u305f\u7d50\u679c\u3068\u3057\u3066\u8aac\u660e\u3059\u308b\u306e\u304c\u6700\u3082\u6574\u5408\u7684\u3067\u3042\u308b\u3002\u7279\u306b\u91cd\u8981\u306a\u306e\u306f\u30015TB HDD \u3067\u306f\u554f\u984c\u304c\u767a\u751f\u3057\u306a\u304b\u3063\u305f\u4e00\u65b9\u3067\u30012TB HDD \u3067\u306f\u554f\u984c\u304c\u767a\u751f\u3057\u305f\u70b9\u3067\u3042\u308b\u3002\u3053\u306e\u5dee\u306f\u3001\u300c2.5-inch HDD \u306f\u3059\u3079\u3066\u3060\u3081\u300d\u3068\u3082\u300cLUKS + ext4 \u306f\u3059\u3079\u3066\u3060\u3081\u300d\u3068\u3082\u8a00\u3048\u306a\u3044\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u308b\u3002\u6b63\u3057\u304f\u306f\u3001\u5a92\u4f53\u30e2\u30c7\u30eb\u3054\u3068\u306e\u5185\u90e8\u8a2d\u8a08\u3001\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\u3001SMR \u5b9f\u88c5\u3001USB \u30d6\u30ea\u30c3\u30b8\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3001\u521d\u671f\u5316\u72b6\u614b\u3001\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u5224\u65ad\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
\u8981\u56e0<\/th>\n\u5bc4\u4e0e\u5ea6<\/th>\n\u78ba\u5ea6<\/th>\n\u6839\u62e0<\/th>\n<\/tr>\n<\/thead>\n
2.5-inch HDD \u306e\u4f4e IOPS<\/td>\n\u6975\u5927<\/td>\n\u9ad8<\/td>\n5400 rpm\u3001\u6a5f\u68b0\u7684 seek\u3001\u56de\u8ee2\u5f85\u3061\u304c\u5c0f\u30d5\u30a1\u30a4\u30eb\u5927\u91cf\u51e6\u7406\u3067\u52b9\u304f\u3002<\/td>\n<\/tr>\n
SMR<\/td>\n\u6975\u5927<\/td>\n\u4e2d\u301c\u9ad8<\/td>\n2TB \u7d1a 2.5-inch HDD \u306b\u306f Drive-Managed SMR \u63a1\u7528\u4f8b\u304c\u3042\u308a\u3001media cache \u67af\u6e07\u3068 band rewrite \u304c\u8aac\u660e\u529b\u3092\u6301\u3064\u3002<\/td>\n<\/tr>\n
ext4 journal \/ metadata<\/td>\n\u5927<\/td>\n\u9ad8<\/td>\ndata=ordered\u3001journal\u3001inode\u3001permission\u3001mtime \u66f4\u65b0\u304c FAT \u3088\u308a\u91cd\u3044\u3002<\/td>\n<\/tr>\n
barrier \/ flush<\/td>\n\u5927<\/td>\n\u4e2d\u301c\u9ad8<\/td>\nwrite barrier \u306f\u65e2\u5b9a\u3067\u6709\u52b9\u3067\u3042\u308a\u3001HDD \u3067\u306f\u5f85\u3061\u6642\u9593\u3068\u3057\u3066\u898b\u3048\u3084\u3059\u3044\u3002<\/td>\n<\/tr>\n
mkfs.ext4 \u76f4\u5f8c\u306e lazy init<\/td>\n\u4e2d\u301c\u5927<\/td>\n\u4e2d<\/td>\n\u521d\u56de\u30de\u30a6\u30f3\u30c8\u5f8c\u306e inode table \u521d\u671f\u5316\u304c\u5927\u91cf\u6295\u5165\u3068\u7af6\u5408\u3057\u3046\u308b\u3002<\/td>\n<\/tr>\n
dm-crypt \u7d4c\u8def<\/td>\n\u4e2d<\/td>\n\u4e2d<\/td>\nworkqueue \u3068 I\/O \u7d4c\u8def\u306e\u5f71\u97ff\u306f\u3042\u308b\u304c\u3001Stick SSD \u3084 5TB HDD \u3067\u6df1\u523b\u5316\u3057\u306a\u3044\u306a\u3089\u5358\u72ec\u4e3b\u56e0\u3067\u306f\u306a\u3044\u3002<\/td>\n<\/tr>\n
FAT \u306e\u8efd\u3055<\/td>\n\u5927<\/td>\n\u9ad8<\/td>\njournal\u3001Unix metadata\u3001inode \u7ba1\u7406\u3092\u6301\u305f\u306a\u3044\u305f\u3081\u3001\u65e7\u69cb\u6210\u3067\u306f\u5a92\u4f53\u306e\u5f31\u70b9\u304c\u9732\u51fa\u3057\u306b\u304f\u304b\u3063\u305f\u3002<\/td>\n<\/tr>\n
\u30b3\u30d4\u30fc\u30b3\u30de\u30f3\u30c9\u5dee<\/td>\n\u9664\u5916<\/td>\n\u9ad8<\/td>\nrsync \u3067\u3082\u540c\u69d8\u306e\u305f\u3081\u3001\u4eca\u56de\u306e\u4e3b\u8981\u56e0\u304b\u3089\u5916\u3059\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u3053\u306e\u6574\u7406\u304b\u3089\u5206\u304b\u308b\u306e\u306f\u3001\u4eca\u56de\u306e\u554f\u984c\u3092\u300cLUKS \u304c\u9045\u3044\u300d\u300cext4 \u304c\u9045\u3044\u300d\u300c2.5-inch HDD \u304c\u3060\u3081\u300d\u3068\u5358\u7d14\u5316\u3057\u3066\u306f\u3044\u3051\u306a\u3044\u3068\u3044\u3046\u3053\u3068\u3067\u3042\u308b\u3002LUKS + ext4 \u306f\u3001Linux \u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u5a92\u4f53\u3068\u3057\u3066\u8ad6\u7406\u7684\u306b\u306f\u6574\u3063\u3066\u3044\u308b\u3002\u3057\u304b\u3057\u3001\u305d\u306e\u6574\u5408\u6027\u306f\u7121\u511f\u3067\u306f\u306a\u3044\u30022.5-inch 2TB HDD \u306e\u3088\u3046\u306a\u4f4e IOPS\u3001SMR\u3001\u4f4e\u96fb\u529b\u3001USB \u63a5\u7d9a\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u5236\u7d04\u3092\u6301\u3064\u5a92\u4f53\u3067\u306f\u3001ext4 \u306e journal\u3001metadata\u3001barrier\u3001lazy initialization\u3001dm-crypt \u306e I\/O \u7d4c\u8def\u304c\u91cd\u306a\u308a\u3001TrueCrypt + FAT \u6642\u4ee3\u306b\u306f\u898b\u3048\u3066\u3044\u306a\u304b\u3063\u305f\u5a92\u4f53\u6027\u80fd\u306e\u9650\u754c\u304c\u9732\u51fa\u3059\u308b\u3002<\/p>\n

\n

13. \u904b\u7528\u4e0a\u306e\u7d50\u8ad6<\/h2>\n

\u904b\u7528\u5224\u65ad\u3068\u3057\u3066\u306f\u3001LUKS + ext4 \u3092\u6368\u3066\u308b\u5fc5\u8981\u306f\u306a\u3044\u3002\u3057\u304b\u3057\u3001\u3059\u3079\u3066\u306e\u5a92\u4f53\u306b\u4e00\u5f8b\u3067 LUKS + ext4 \u3092\u9069\u7528\u3059\u308b\u3079\u304d\u3067\u3082\u306a\u3044\u3002SSD \u3084 3.5-inch CMR HDD \u3067\u306f\u3001LUKS + ext4 \u306f\u6697\u53f7\u5316\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u306e\u4e3b\u7cfb\u3068\u3057\u3066\u59a5\u5f53\u3067\u3042\u308b\u3002\u4e00\u65b9\u30012.5-inch 2TB HDD\u3001\u7279\u306b SMR \u306e\u53ef\u80fd\u6027\u304c\u3042\u308a\u3001\u5b9f\u6e2c\u3067\u6027\u80fd\u554f\u984c\u304c\u51fa\u305f\u5a92\u4f53\u306f\u3001\u5927\u91cf\u66f4\u65b0\u5148\u3067\u306f\u306a\u304f\u3001\u4f4e\u983b\u5ea6\u30a2\u30fc\u30ab\u30a4\u30d6\u3001\u4e92\u63db\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3001\u6301\u3061\u51fa\u3057\u7528\u3001\u3042\u308b\u3044\u306f\u65e2\u5b58 TrueCrypt + FAT \u5a92\u4f53\u306e\u66f4\u65b0\u505c\u6b62\u4fdd\u5168\u5148\u3068\u3057\u3066\u5f79\u5272\u3092\u9650\u5b9a\u3059\u308b\u65b9\u304c\u5408\u7406\u7684\u3067\u3042\u308b\u3002<\/p>\n\n\n\n\n\n\n\n\n\n
\u5a92\u4f53<\/th>\nLUKS + ext4 \u9069\u6027<\/th>\n\u63a8\u5968\u7528\u9014<\/th>\n\u5224\u65ad\u7406\u7531<\/th>\n<\/tr>\n<\/thead>\n
SSD<\/td>\n\u9ad8\u3044<\/td>\n\u66f4\u65b0\u983b\u5ea6\u306e\u9ad8\u3044\u6697\u53f7\u5316\u30d0\u30c3\u30af\u30a2\u30c3\u30d7<\/td>\nseek \u304c\u306a\u304f\u3001\u5c0f\u66f8\u304d\u8fbc\u307f\u3068 metadata \u66f4\u65b0\u3092\u5438\u53ce\u3057\u3084\u3059\u3044\u3002<\/td>\n<\/tr>\n
3.5-inch CMR HDD<\/td>\n\u4e2d\u301c\u9ad8<\/td>\n\u5927\u5bb9\u91cf\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3001\u5b9a\u671f\u540c\u671f<\/td>\n\u96fb\u6e90\u3068\u7b50\u4f53\u306b\u4f59\u88d5\u304c\u3042\u308a\u3001SMR \u3088\u308a\u66f4\u65b0\u6027\u80fd\u304c\u5b89\u5b9a\u3057\u3084\u3059\u3044\u3002<\/td>\n<\/tr>\n
Seagate Expansion Portable 5TB<\/td>\n\u4e2d<\/td>\n\u5b9f\u6e2c\u4e0a\u554f\u984c\u304c\u306a\u3044\u7bc4\u56f2\u3067\u306e\u6697\u53f7\u5316\u30d0\u30c3\u30af\u30a2\u30c3\u30d7<\/td>\n\u540c\u3058 2.5-inch \u3067\u3082\u4eca\u56de\u306e\u89b3\u6e2c\u3067\u306f\u81f4\u547d\u7684\u554f\u984c\u304c\u51fa\u3066\u3044\u306a\u3044\u3002<\/td>\n<\/tr>\n
Transcend StoreJet 25M3S 2TB<\/td>\n\u4f4e\u301c\u4e2d<\/td>\n\u4f4e\u983b\u5ea6\u4fdd\u7ba1\u3001\u6301\u3061\u51fa\u3057\u3001\u66f4\u65b0\u91cf\u3092\u7d5e\u3063\u305f\u7528\u9014<\/td>\n\u5b9f\u6e2c\u3067 LUKS + ext4 \u306e\u5927\u91cf\u66f4\u65b0\u304c\u7834\u7dbb\u3057\u3066\u3044\u308b\u3002<\/td>\n<\/tr>\n
TrueCrypt + FAT \u65e2\u5b58\u5a92\u4f53<\/td>\n\u65b0\u898f\u4e3b\u7cfb\u306b\u306f\u4e0d\u9069<\/td>\n\u4e92\u63db\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3001\u65e2\u5b58\u8cc7\u7523\u4fdd\u5168<\/td>\n\u6027\u80fd\u9762\u3067\u306f\u8efd\u3044\u304c\u3001Linux \u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u5b8c\u5168\u6027\u3068\u5c06\u6765\u904b\u7528\u6027\u306f\u5f31\u3044\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u7d50\u8ad6\u306f\u3001LUKS + ext4 \u304c\u9593\u9055\u3063\u3066\u3044\u305f\u3001\u3067\u306f\u306a\u3044\u3002\u4eca\u56de\u306e\u6559\u8a13\u306f\u3001\u6697\u53f7\u5316\u65b9\u5f0f\u306e\u512a\u52a3\u3067\u306f\u306a\u304f\u3001\u5a92\u4f53\u3054\u3068\u306e\u6027\u80fd\u7279\u6027\u3092\u7121\u8996\u3057\u3066\u540c\u3058\u4fdd\u5b58\u69cb\u9020\u3092\u4e00\u5f8b\u9069\u7528\u3057\u3066\u306f\u3044\u3051\u306a\u3044\u3001\u3068\u3044\u3046\u70b9\u306b\u3042\u308b\u3002\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u8a2d\u8a08\u3067\u306f\u3001\u6697\u53f7\u5316\u65b9\u5f0f\u3001\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3001\u5a92\u4f53\u7a2e\u5225\u3001\u66f4\u65b0\u983b\u5ea6\u3001\u5fa9\u5143\u76ee\u7684\u3092\u307e\u3068\u3081\u3066\u8a55\u4fa1\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002\u8ad6\u7406\u7684\u306b\u6b63\u3057\u3044\u69cb\u6210\u3067\u3042\u3063\u3066\u3082\u3001\u66f4\u65b0\u51e6\u7406\u304c\u5b9f\u7528\u6642\u9593\u5185\u306b\u7d42\u308f\u3089\u305a\u3001\u7d99\u7d9a\u904b\u7528\u3067\u304d\u306a\u3044\u306a\u3089\u3001\u5fa9\u5143\u53ef\u80fd\u6027\u3092\u652f\u3048\u308b\u8a2d\u8a08\u3068\u3057\u3066\u306f\u4e0d\u5341\u5206\u3067\u3042\u308b\u3002<\/p>\n

\n

\u53c2\u8003\u6587\u732e<\/h2>\n
    \n
  1. id774, \u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3068\u306f\u5fa9\u5143\u53ef\u80fd\u6027\u3092\u8a2d\u8a08\u3059\u308b\u3053\u3068\u3067\u3042\u308b\uff082026-05-07\uff09. https:\/\/blog.id774.net\/entry\/2026\/05\/07\/4728\/<\/a><\/li>\n
  2. id774, \u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u30fb\u30ea\u30ab\u30d0\u30ea\u30fc\u6226\u7565\u306b\u304a\u3051\u308b\u7269\u7406\u5a92\u4f53\u7ba1\u7406\uff082026-05-10\uff09. https:\/\/blog.id774.net\/entry\/2026\/05\/10\/4743\/<\/a><\/li>\n
  3. id774, LUKS \u6697\u53f7\u5316\u306e\u624b\u9806\u3068\u904b\u7528\uff082026-05-11\uff09. https:\/\/blog.id774.net\/entry\/2026\/05\/11\/4746\/<\/a><\/li>\n
  4. id774, TrueCrypt \u8cc7\u7523\u3092 GNU\/Linux \u3067\u4fdd\u5168\u3059\u308b\uff082026-05-16\uff09. https:\/\/blog.id774.net\/entry\/2026\/05\/16\/4773\/<\/a><\/li>\n
  5. id774, \u672a\u6765\u306e\u81ea\u5206\u306b\u610f\u5473\u3092\u6b8b\u3059\uff082026-05-12\uff09. https:\/\/blog.id774.net\/entry\/2026\/05\/12\/4750\/<\/a><\/li>\n
  6. Seagate, Expansion Portable Drive Data Sheet. https:\/\/www.seagate.com\/www-content\/datasheets\/pdfs\/expansion-portable-DS2060-1-2102-WW-en_US.pdf<\/a><\/li>\n
  7. Seagate, BarraCuda 2.5-inch HDD Data Sheet. https:\/\/www.seagate.com\/www-content\/datasheets\/pdfs\/barracuda-2-5-DS1907-3-2005US-en_US.pdf<\/a><\/li>\n
  8. Transcend, StoreJet 25M3 Portable Hard Drives. https:\/\/us.transcend-info.com\/product\/external-hard-drive\/storejet-25m3<\/a><\/li>\n
  9. Transcend, StoreJet 25M3 Product Sheet. https:\/\/docs.rs-online.com\/a21c\/0900766b816fadae.pdf<\/a><\/li>\n
  10. Dateks, Transcend StoreJet 25M3 2TB Specification Summary. https:\/\/www.dateks.lv\/en\/cenas\/external-hdd\/164160-transcend-storejet-25m3-2tb-green<\/a><\/li>\n
  11. Western Digital, Shingled Magnetic Recording HDD Technology White Paper. https:\/\/documents.westerndigital.com\/content\/dam\/doc-library\/en_us\/assets\/public\/western-digital\/collateral\/white-paper\/white-paper-shingled-magnetic-recording-hdd-technology.pdf<\/a><\/li>\n
  12. Toshiba, Shingled Magnetic Recording Technologies for Large-Capacity Hard Disk Drives. https:\/\/www.global.toshiba\/content\/dam\/toshiba\/migration\/corp\/techReviewAssets\/tech\/review\/en\/01_02\/pdf\/a08.pdf<\/a><\/li>\n
  13. Toshiba, MQ04AB Series Product Overview. https:\/\/toshiba.semicon-storage.com\/content\/dam\/toshiba-ss-v3\/master\/en\/storage\/product\/internal-specialty\/cHDD-MQ04AB_product-overview_r2s.pdf<\/a><\/li>\n
  14. Linux Kernel Documentation, ext4 General Information. https:\/\/docs.kernel.org\/admin-guide\/ext4.html<\/a><\/li>\n
  15. Linux Kernel Documentation, ext4 Journal. https:\/\/www.kernel.org\/doc\/html\/latest\/filesystems\/ext4\/journal.html<\/a><\/li>\n
  16. Linux Kernel Documentation, ext4 Block and Inode Allocation Policy. https:\/\/docs.kernel.org\/filesystems\/ext4\/allocators.html<\/a><\/li>\n
  17. man7.org, ext4(5) Linux manual page. https:\/\/man7.org\/linux\/man-pages\/man5\/ext3.5.html<\/a><\/li>\n
  18. man7.org, mke2fs(8) Linux manual page. https:\/\/man7.org\/linux\/man-pages\/man8\/mke2fs.8.html<\/a><\/li>\n
  19. man7.org, mke2fs.conf(5) Linux manual page. https:\/\/man7.org\/linux\/man-pages\/man5\/mke2fs.conf.5.html<\/a><\/li>\n
  20. Linux Kernel Documentation, dm-crypt. https:\/\/docs.kernel.org\/admin-guide\/device-mapper\/dm-crypt.html<\/a><\/li>\n
  21. Cloudflare, Speeding up Linux disk encryption. https:\/\/blog.cloudflare.com\/speeding-up-linux-disk-encryption\/<\/a><\/li>\n
  22. man7.org, cryptsetup-benchmark(8) Linux manual page. https:\/\/man7.org\/linux\/man-pages\/man8\/cryptsetup-benchmark.8.html<\/a><\/li>\n
  23. Debian manpages, cryptsetup(8). https:\/\/manpages.debian.org\/testing\/cryptsetup-bin\/cryptsetup.8.en.html<\/a><\/li>\n
  24. Microsoft, FAT32 File System Specification. https:\/\/www.cs.fsu.edu\/~cop4610t\/assignments\/project3\/spec\/fatspec.pdf<\/a><\/li>\n
  25. Microsoft Learn, exFAT Specification. https:\/\/learn.microsoft.com\/en-us\/windows\/win32\/fileio\/exfat-specification<\/a><\/li>\n
  26. Oracle, smartctl(8) Manual Page. https:\/\/docs.oracle.com\/cd\/E75431_01\/html\/E72377\/smartctl-8.html<\/a><\/li>\n
  27. fio Documentation, Flexible I\/O tester. https:\/\/fio.readthedocs.io\/en\/latest\/fio_doc.html<\/a><\/li>\n
  28. Oracle Cloud Infrastructure Documentation, Sample FIO Commands for Block Volume Performance Tests. https:\/\/docs.oracle.com\/en-us\/iaas\/Content\/Block\/References\/samplefiocommandslinux.htm<\/a><\/li>\n
  29. man7.org, hdparm(8) Linux manual page. https:\/\/man7.org\/linux\/man-pages\/man8\/hdparm.8.html<\/a><\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

    \u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u5a92\u4f53\u306e\u8a2d\u8a08\u3067\u306f\u3001\u6697\u53f7\u5316\u65b9\u5f0f\u3001\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3001\u5a92\u4f53\u7a2e\u5225\u3001\u540c\u671f\u65b9\u5f0f\u3092\u8ad6\u7406\u7684\u306b\u6574\u3048\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3042\u308b\u3002\u3057\u304b\u3057\u3001\u8ad6\u7406\u7684\u306b\u6574\u3063\u305f\u69cb\u6210\u304c\u3001\u5b9f\u969b\u306e\u5a92\u4f53\u6027\u80fd\u306e\u4e0a\u3067\u3082\u6b63\u3057\u3044\u3068\u306f\u9650\u3089\u306a\u3044\u3002\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u306e\u672c\u8cea\u306f\u3001\u4fdd\u5b58\u3055\u308c\u305f\u30d5\u30a1\u30a4 … \u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[33,17,31,14],"tags":[],"class_list":["post-4801","post","type-post","status-publish","format-standard","hentry","category-cryptography","category-diary","category-resilience","category-tech"],"_links":{"self":[{"href":"https:\/\/blog.id774.net\/entry\/wp-json\/wp\/v2\/posts\/4801","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.id774.net\/entry\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.id774.net\/entry\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.id774.net\/entry\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.id774.net\/entry\/wp-json\/wp\/v2\/comments?post=4801"}],"version-history":[{"count":2,"href":"https:\/\/blog.id774.net\/entry\/wp-json\/wp\/v2\/posts\/4801\/revisions"}],"predecessor-version":[{"id":4803,"href":"https:\/\/blog.id774.net\/entry\/wp-json\/wp\/v2\/posts\/4801\/revisions\/4803"}],"wp:attachment":[{"href":"https:\/\/blog.id774.net\/entry\/wp-json\/wp\/v2\/media?parent=4801"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.id774.net\/entry\/wp-json\/wp\/v2\/categories?post=4801"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.id774.net\/entry\/wp-json\/wp\/v2\/tags?post=4801"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}