{"id":2877,"date":"2023-10-02T13:00:00","date_gmt":"2023-10-02T04:00:00","guid":{"rendered":"https:\/\/testhagisolcojp.gptw.net\/techblog\/?p=2877"},"modified":"2024-07-17T07:43:20","modified_gmt":"2024-07-16T22:43:20","slug":"post-2877","status":"publish","type":"post","link":"https:\/\/testhagisolcojp.gptw.net\/techblog\/?p=2877","title":{"rendered":"SSD\u304c\u5bfe\u5fdc\u3059\u308bNAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u306e\u4fe1\u983c\u6027\u4e0a\u306e\u5236\u7d04"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" src=\"https:\/\/testhagisolcojp.gptw.net\/techblog\/wp-content\/uploads\/2023\/03\/AdobeStock_213317767-1024x683.jpeg\" alt=\"\" class=\"wp-image-2361\"\/><\/figure>\n\n\n\n<h2 id=\"outline__1\" class=\"wp-block-heading\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u3053\u306e\u8a18\u4e8b\u3067\u7d39\u4ecb\u3057\u3066\u3044\u308b\u88fd\u54c1<\/mark><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-medium-font-size\"><a href=\"https:\/\/testhagisolcojp.gptw.net\/products\/storage\" target=\"_blank\" rel=\"noreferrer noopener\">\u7523\u696d\u7528\u30b9\u30c8\u30ec\u30fc\u30b8\u88fd\u54c1(NVMe SSD, SATA SSD)<\/a><\/li>\n<\/ul>\n\n\n\n<h2 id=\"outline__2\" class=\"wp-block-heading\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u304a\u3053\u3068\u308f\u308a<\/mark><\/h2>\n\n\n\n<p>\u3000\u3053\u306e\u8a18\u4e8b\u306f\u3001<a rel=\"noreferrer noopener\" href=\"https:\/\/qiita.com\/ken-yossy\/items\/0f43eb4d7c3cdbc47713\" target=\"_blank\">2020\u5e7411\u6708\u306bQiita\u306b\u6295\u7a3f\u3057\u305f\u8a18\u4e8b<\/a>\u3092\u52a0\u7b46\u4fee\u6b63\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u307e\u305f\u3001\u3053\u306e\u8a18\u4e8b\u306e\u30aa\u30ea\u30b8\u30ca\u30eb\u306f\u65e5\u672c\u8a9e\u3067\u66f8\u304b\u308c\u3066\u3044\u307e\u3059\u3002\u8a18\u4e8b\u304c\u65e5\u672c\u8a9e\u4ee5\u5916\u306e\u8a00\u8a9e\u3067\u8868\u793a\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u305d\u308c\u306f\u6a5f\u68b0\u7ffb\u8a33\u306e\u7d50\u679c\u3067\u3059\u3002\u5f53\u793e\u306f\u6a5f\u68b0\u7ffb\u8a33\u306e\u7cbe\u5ea6\u306b\u8cac\u4efb\u3092\u8ca0\u3044\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h2 id=\"outline__3\" class=\"wp-block-heading\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u306f\u3058\u3081\u306b<\/mark><\/h2>\n\n\n\n<p>\u3000SSD\u306e\u5bff\u547d\u3092\u5de6\u53f3\u3059\u308b\u6700\u3082\u5927\u304d\u306a\u8981\u7d20\u306e\u3072\u3068\u3064\u306f\u3001\u3054\u5b58\u77e5\u306e\u901a\u308a\u3001NAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u306e\u30e1\u30e2\u30ea\u30bb\u30eb\u306e\u300c\u4fdd\u8a3c\u66f8\u304d\u63db\u3048\u56de\u6570\u300d\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3000SSD\uff08\u306e\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\uff09\u306f\u3001\u30e1\u30e2\u30ea\u30bb\u30eb\u306e\u66f8\u304d\u63db\u3048\u56de\u6570\u5897\u52a0\u306b\u3088\u308b\u30c7\u30fc\u30bf\u4fdd\u6301\u80fd\u529b\u306e\u4f4e\u4e0b\u306b\u52a0\u3048\u3001NAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u304c\u62b1\u3048\u308b\u69d8\u3005\u306a\u4fe1\u983c\u6027\u4e0a\u306e\u5236\u7d04\u306b\u5bfe\u5fdc\u3059\u308b\u3053\u3068\u3067\u3001\u5de5\u696d\u88fd\u54c1\u3068\u3057\u3066\u306e\u4fe1\u983c\u6027\u3092\u9054\u6210\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u4eca\u56de\u306e\u8a18\u4e8b\u3067\u306f\u3001SSD\u304c\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u305d\u308c\u3089NAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u306e\u4fe1\u983c\u6027\u4e0a\u306e\u5236\u7d04\u306e\u3072\u3068\u3064\u3092\u3054\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 id=\"outline__4\" class=\"wp-block-heading\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u307e\u3068\u3081<\/mark><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30e1\u30e2\u30ea\u30bb\u30eb\u306e\u4fdd\u8a3c\u66f8\u304d\u63db\u3048\u56de\u6570\u306e\u4ed6\u306b\u3082\u3001SSD\u304c\u5bfe\u5fdc\u3059\u3079\u304dNAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u306e\u4fe1\u983c\u6027\u4e0a\u306e\u5236\u7d04\u304c\u5b58\u5728\u3059\u308b<\/li>\n\n\n\n<li>NAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u306e\u6280\u8853\u9032\u5316\u306b\u3068\u3082\u306a\u3044\u3001\u305d\u308c\u3089\u306e\u5236\u7d04\u3078\u306e\u5bfe\u5fdc\u304c\u3055\u3089\u306b\u91cd\u8981\u306b\u306a\u308b<\/li>\n<\/ul>\n\n\n\n<h2 id=\"outline__5\" class=\"wp-block-heading\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">NAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u304c\u8aad\u307f\u66f8\u304d\u3067\u304d\u306a\u304f\u306a\u308b\u8981\u56e0<\/mark><\/h2>\n\n\n\n<p>\u3000NAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u304c\u305d\u306e\u6a5f\u80fd\uff08\u7279\u306b\u8a18\u9332\u3057\u305f\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u51fa\u3057\uff09\u3092\u679c\u305f\u305b\u306a\u304f\u306a\u308b\u8981\u56e0\u306f\u3001\u4ee5\u4e0b\u306e3\u7a2e\u985e\u306b\u5927\u5225\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30e1\u30e2\u30ea\u30bb\u30eb\u306e\u30c7\u30fc\u30bf\u4fdd\u6301\u80fd\u529b\u306e\u4f4e\u4e0b<\/li>\n\n\n\n<li>\u30c7\u30fc\u30bf\u4fdd\u6301\u80fd\u529b\u4f4e\u4e0b\u4ee5\u5916\u306e\u30e1\u30e2\u30ea\u30bb\u30eb\u306e\u5236\u7d04<\/li>\n\n\n\n<li>\u5927\u898f\u6a21\u30a8\u30e9\u30fc <\/li>\n<\/ol>\n\n\n\n<p><\/p>\n\n\n\n<p>\u3000\u4e00\u3064\u76ee\u306e\u300c\u30e1\u30e2\u30ea\u30bb\u30eb\u306e\u30c7\u30fc\u30bf\u4fdd\u6301\u80fd\u529b\u306e\u4f4e\u4e0b\u300d\u306f\u3001\u5e83\u304f\u77e5\u3089\u308c\u3066\u3044\u308b\u3001\u4e3b\u306b\u66f8\u304d\u63db\u3048\u56de\u6570\u306e\u5897\u52a0\u306b\u3088\u308a\u30e1\u30e2\u30ea\u30bb\u30eb\u306e\u30c7\u30fc\u30bf\u4fdd\u6301\u80fd\u529b\u304c\u4f4e\u4e0b\u3059\u308b\u73fe\u8c61\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3000NAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u306e1\u30c1\u30c3\u30d7\u5185\u306b\u306f\u3001\u81a8\u5927\u306a\u6570\u306e\u30e1\u30e2\u30ea\u30bb\u30eb\u304c\u5b58\u5728\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u5bb9\u91cf\u304c512\u30ae\u30ac\u30d3\u30c3\u30c8\u306eTLC NAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u30c1\u30c3\u30d7\u306b\u306f\u3001\u7d041,800\u5104\u500b\u306e\u30e1\u30e2\u30ea\u30bb\u30eb\u304c\u5b58\u5728\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30e1\u30e2\u30ea\u30bb\u30eb\u3072\u3068\u3064\u305a\u3064\u304c\uff08\u30e2\u30c7\u30eb\u3068\u3057\u3066\u306f\uff09\u72ec\u7acb\u306b\u75b2\u5f0a\u3057\u3066\u30c7\u30fc\u30bf\u4fdd\u6301\u80fd\u529b\u304c\u4f4e\u4e0b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u4e8c\u3064\u76ee\u306e\u300c\u305d\u306e\u4ed6\u30e1\u30e2\u30ea\u30bb\u30eb\u306e\u5236\u7d04\u300d\u3068\u306f\u3001\u4f8b\u3048\u3070\u300c\u8aad\u307f\u51fa\u3057\u56de\u6570\u300d\u306b\u95a2\u3059\u308b\u5236\u7d04\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u3053\u308c\u306f\u3044\u308f\u3086\u308b&#8221;Read Disturb&#8221;\u306b\u4f34\u3046\u5236\u7d04\u3067\u3059\u3002\u300c\u4fdd\u8a3c\u66f8\u304d\u63db\u3048\u56de\u6570\u300d\u3068\u540c\u69d8\u306b\u300c\u4fdd\u8a3c\u8aad\u307f\u51fa\u3057\u56de\u6570\u300d\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u308bNAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u30e1\u30fc\u30ab\u30fc\u3082\u5b58\u5728\u3057\u307e\u3059\u3002Read Disturb\u306b\u3064\u304d\u307e\u3057\u3066\u306f\u672c\u6280\u8853\u30b3\u30e9\u30e0\u306e <a rel=\"noreferrer noopener\" href=\"https:\/\/testhagisolcojp.gptw.net\/techblog\/?p=877\" target=\"_blank\">\u5225\u8a18\u4e8b<\/a> \u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<p>\u3000\u6700\u5f8c\u306e\u300c\u5927\u898f\u6a21\u30a8\u30e9\u30fc\u300d\u3068\u306f\u3001\u30e1\u30e2\u30ea\u30bb\u30eb\u3092\u542b\u3080NAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u69cb\u6210\u8981\u7d20\u306e\u4fe1\u983c\u6027\u4f4e\u4e0b\u3084\u6545\u969c\u306b\u8d77\u56e0\u3059\u308b\u3001\u4e00\u3064\u76ee\u306e\u300c\u30e1\u30e2\u30ea\u30bb\u30eb\u306e\u30c7\u30fc\u30bf\u4fdd\u6301\u80fd\u529b\u306e\u4f4e\u4e0b\u300d\u306e\u6551\u6e08\u7528\u306bSSD\u304c\u5099\u3048\u308b\u8aa4\u308a\u8a02\u6b63\u6a5f\u80fd\u3067\u306f\u5bfe\u5fdc\u3067\u304d\u306a\u3044\u307b\u3069\u30d3\u30c3\u30c8\u6570\u306e\u591a\u3044\u30a8\u30e9\u30fc\u306e\u3053\u3068\u3092\u6307\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u3053\u306e\u4e09\u3064\u306e\u3046\u3061\u300c\u5927\u898f\u6a21\u30a8\u30e9\u30fc\u300d\u3078\u306e\u5bfe\u5fdc\u65b9\u6cd5\u306e\u4e00\u4f8b\u3092\u3054\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 id=\"outline__6\" class=\"wp-block-heading\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u5927\u898f\u6a21\u30a8\u30e9\u30fc<\/mark><\/h2>\n\n\n\n<h3 id=\"outline__6_1\" class=\"wp-block-heading\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u5927\u898f\u6a21\u30a8\u30e9\u30fc\u3068\u306f<\/mark><\/h3>\n\n\n\n<p>\u3000SSD\u304c\u5bfe\u5fdc\u3059\u308b\u3001NAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u306b\u8a18\u9332\u3057\u305f\u30c7\u30fc\u30bf\u306b\u751f\u3058\u308b\u8aa4\u308a\uff08\u30a8\u30e9\u30fc\uff09\u306f\u3001\u5927\u304d\u304f2\u3064\u306b\u5206\u985e\u3067\u304d\u307e\u3059\u3002\u305d\u308c\u306f\u3001\u30e9\u30f3\u30c0\u30e0\u30a8\u30e9\u30fc\u3068\u5927\u898f\u6a21\u30a8\u30e9\u30fc\u3067\u3059\uff08\u56f31\uff09\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized is-style-default\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/testhagisolcojp.gptw.net\/techblog\/wp-content\/uploads\/2023\/06\/errors-2-1024x282.png\" alt=\"\" class=\"wp-image-2894\" width=\"840\" height=\"231\"\/><figcaption class=\"wp-element-caption\"><em>\u56f31\uff1aSSD\u304c\u5bfe\u5fdc\u3059\u308bNAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u306e\u30a8\u30e9\u30fc\u306e\u7a2e\u985e<\/em><\/figcaption><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>\u3000\u66f8\u304d\u63db\u3048\u56de\u6570\u306e\u5897\u52a0\u306b\u3088\u308b\u30c7\u30fc\u30bf\u4fdd\u6301\u7279\u6027\u4f4e\u4e0b\u306a\u3069\u306e\u8981\u56e0\u3067\u30e1\u30e2\u30ea\u30bb\u30eb1\u3064\u305a\u3064\u306b\u8d77\u3053\u308b\u30c7\u30fc\u30bf\u8aa4\u308a\u306f\u3001\u56f31\u306e\u30e9\u30f3\u30c0\u30e0\u30a8\u30e9\u30fc\u306b\u76f8\u5f53\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u4e0a\u8a18\u8981\u56e0\u306b\u3088\u308b\u30e1\u30e2\u30ea\u30bb\u30eb\u306b\u8a18\u9332\u3057\u305f\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u51fa\u3057\u6642\u306e\u8aa4\u308a\uff08\u30a8\u30e9\u30fc\uff09\u306f\u3001\u4ed6\u306e\u30e1\u30e2\u30ea\u30bb\u30eb\u304c\u30a8\u30e9\u30fc\u3092\u8d77\u3053\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3068\u306f\u95a2\u4fc2\u306a\u304f\u3001\u5404\u30e1\u30e2\u30ea\u30bb\u30eb\u306b\u3053\u306e\u8981\u56e0\u304c\u84c4\u7a4d\u3057\u305f\u7d50\u679c\u3068\u3057\u3066\u3001\u30d3\u30c3\u30c8\u5358\u4f4d\u3067\u767a\u751f\u3059\u308b\u3001\u3068\u30e2\u30c7\u30eb\u5316\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u767a\u751f\u3059\u308b\u4f4d\u7f6e\u3082\u30e9\u30f3\u30c0\u30e0\u3067\u3042\u308b\u3068\u4eee\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u3053\u308c\u304c\u3001\u300c\u30e9\u30f3\u30c0\u30e0\u30a8\u30e9\u30fc\u300d\u3068\u547c\u3070\u308c\u308b\u7406\u7531\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3000SSD\u306f\u3053\u306e\u30e9\u30f3\u30c0\u30e0\u30a8\u30e9\u30fc\u3092\u3001BCH (Bose-Chaudhuri-Hocquenghem)\u7b26\u53f7\u3084LDPC (Low-Density Parity-Check)\u7b26\u53f7\u306a\u3069\u306e\u8aa4\u308a\u8a02\u6b63\u7b26\u53f7\u3092\u7528\u3044\u3066\u30d3\u30c3\u30c8\u5358\u4f4d\u3067\u8a02\u6b63\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u4e00\u65b9\u3001\u30e9\u30f3\u30c0\u30e0\u30a8\u30e9\u30fc\u3068\u306f\u767a\u751f\u539f\u7406\u3082\u30c7\u30fc\u30bf\u8aa4\u308a\u306e\u898f\u6a21\u3082\u7570\u306a\u308b\u30a8\u30e9\u30fc\u304c\u5b58\u5728\u3057\u307e\u3059\u3002\u305d\u308c\u304c\u5927\u898f\u6a21\u30a8\u30e9\u30fc\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u30002019\u5e74\u306b\u958b\u50ac\u3055\u308c\u305fFlash Memory Summit\u306e\u8b1b\u6f14\u8cc7\u6599<sup>[1]<\/sup>\u3067\u306f\u30013D NAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u3067\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u5927\u898f\u6a21\u30a8\u30e9\u30fc\u306e\u4f8b\u306b\u3064\u3044\u3066\u3001\u56f32\u306e\u3088\u3046\u306b\u8aac\u660e\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-default\"><img decoding=\"async\" src=\"https:\/\/testhagisolcojp.gptw.net\/techblog\/wp-content\/uploads\/2023\/06\/dppm-issue-1-1024x576.png\" alt=\"\" class=\"wp-image-2897\"\/><figcaption class=\"wp-element-caption\"><em>\u56f32\uff1a3D NAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u306e\u5927\u898f\u6a21\u30a8\u30e9\u30fc\uff08FMS 2019\u306e\u8b1b\u6f14\u8cc7\u6599<sup>[1]<\/sup>\u3088\u308a\uff09<\/em><\/figcaption><\/figure>\n\n\n\n<p>\u3000\u56f32\u306e&#8221;Case 1&#8243;\uff08\u5de6\uff09\u3068&#8221;Case 2&#8243;\uff08\u53f3\uff09\u306f\u3001\u8aac\u660e\u306e\u305f\u3081\u306b\u304b\u306a\u308a\u7c21\u7565\u5316\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u305d\u308c\u305e\u308c3D NAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u306e\u30d6\u30ed\u30c3\u30af\u306e\u5185\u90e8\u3092\u8868\u73fe\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u56f32\u306e\u5e73\u305f\u3044\u677f\u306e\u3088\u3046\u306a\u306e\u3082\u306e\u304c\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3(Wordline, WL)\u3067\u3059\u3002\u6a2a\u306b\u5e83\u304c\u308b\u540c\u3058\u756a\u53f7\u306e\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3\uff08&#8221;WLx&#8221;\u306e`x&#8217;\u304c\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3\u306e\u756a\u53f7\uff09\u306f\u3001\u56f3\u4e2d\u3067\u306f\u5207\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u7269\u7406\u7684\u306b\u306f\u4e00\u679a\u306e\u300c\u677f\u300d\u3067\u3059\u3002\u677f\u72b6\u306e\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3\u304cY+1\u679a\u306b\u5207\u308c\u3066\u3044\u308b\u306e\u306f\u3001\u5207\u308c\u305f\u305d\u308c\u305e\u308c\u306e\u90e8\u5206\u3092\u72ec\u7acb\u306b\u64cd\u4f5c\u53ef\u80fd\u3067\u3042\u308b\u3053\u3068\u3092\u8868\u73fe\u3057\u3066\u3044\u308b\u306e\u3060\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u306a\u304a\u3001\u3053\u306e\u56f32\u306fQLC NAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u3092\u60f3\u5b9a\u3057\u3066\u63cf\u304b\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u305f\u3081\u3001\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3\u3092\u5206\u5272\u3057\u305f\u500b\u5225\u306e\u677f\u306b&#8221;4 page&#8221;\u3068\u8a18\u8f09\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u30da\u30fc\u30b8\u30b5\u30a4\u30ba\u306f16 KiB\u3092\u4eee\u5b9a\u3057\u3066\u3044\u308b\u3088\u3046\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u3053\u306e\u56f32\u306e\u8868\u8a18\u3092\u4f7f\u3046\u3068\u3001\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3\u6570\uff08\u5c64\u6570\uff09\u3067\u3042\u308bN+1\u3068\u3001\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3\u306e\u5206\u5272\u6570Y+1\u3068\u3001\u591a\u5024\u5ea6\uff08QLC NAND\u3067\u3042\u308c\u30704\uff09\u3092\u639b\u3051\u7b97\u3057\u305f\u3082\u306e\u304c\u3001\u30d6\u30ed\u30c3\u30af\u5185\u30da\u30fc\u30b8\u6570\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u3055\u3066\u3001\u56f32\u306e&#8221;Case 1&#8243;\u306f\u3001\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3\u304c\u96fb\u6c17\u7684\u306b\u30aa\u30fc\u30d7\u30f3\uff08\u958b\u653e\uff09\u306b\u306a\u308b\u6545\u969c\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u96fb\u6c17\u7684\u306b\u30aa\u30fc\u30d7\u30f3\u306b\u306a\u308b\u3068\u3001\u5bfe\u8c61\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3\uff08\u56f32\u3067\u306f\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3N (WLN)\uff09\u306b\u5bfe\u3057\u3066\u9069\u5207\u306b\u30ea\u30fc\u30c9\u3059\u308b\u305f\u3081\u306e\u96fb\u5727\u3092\u4e0e\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u3064\u307e\u308a\u3001\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3N\u306b\u30c7\u30fc\u30bf\u3092\u8a18\u9332\u3057\u305f\u5f8c\u306b\u3053\u306e\u6545\u969c\u304c\u8d77\u304d\u308b\u3068\u3001\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3N\u4e0a\u306b\u3042\u308b\u5168\u3066\u306e\u30e1\u30e2\u30ea\u30bb\u30eb\u306b\u8a18\u9332\u3055\u308c\u305f\u30c7\u30fc\u30bf\u304c\u8aad\u3081\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u8aad\u3081\u306a\u304f\u306a\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u30c7\u30fc\u30bf\u306e\u30b5\u30a4\u30ba\u306f\u3001\u6700\u5927\u3067\u3001\u56f32\u306b\u8a18\u8f09\u306e\u901a\u308a\u30014\uff08\u30da\u30fc\u30b8\uff09\u00d716 KiB\u00d7(Y+1)<sup>\u6ce8<\/sup>\u3001\u3064\u307e\u308a64 KiB\u4ee5\u4e0a\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u6ce8\uff1a\u56f32\u306b\u306f&#8221;4*16*Y&#8221;\u3068\u66f8\u304b\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u6dfb\u5b57Y\u306f0\u304b\u3089\u958b\u59cb\u3057\u3066\u3044\u308b\u306e\u30670\u304b\u3089Y\u307e\u3067\u3067\u3042\u308c\u3070Y+1\u500b\u3068\u306a\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u3055\u3089\u306b\u3001\u56f32\u306e&#8221;Case 2&#8243;\u306f\u3001\u8907\u6570\u679a\u306e\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3\u3001\u4f8b\u3068\u3057\u30662\u3064\u306e\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3\u304c\u96fb\u6c17\u7684\u306b\u30b7\u30e7\u30fc\u30c8\uff08\u77ed\u7d61\uff09\u3059\u308b\u6545\u969c\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u96fb\u6c17\u7684\u306b\u30b7\u30e7\u30fc\u30c8\u3059\u308b\u3068\u3001\u5bfe\u8c61\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3\uff08\u56f32\u3067\u306f\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3N (WLN)\u3068\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3N-1 (WLN-1)\uff09\u306b\u30ea\u30fc\u30c9\u3059\u308b\u305f\u3081\u306e\u96fb\u5727\u3092\u52a0\u3048\u3066\u3082\u3001\u9069\u5207\u306a\u96fb\u5727\u306b\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>\u3000\u3064\u307e\u308a\u3001\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3N\u3068\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3N-1\u306b\u30c7\u30fc\u30bf\u3092\u8a18\u9332\u3057\u305f\u5f8c\u306b\u3053\u306e\u6545\u969c\u304c\u8d77\u304d\u308b\u3068\u3001\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3N\u3068\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3N-1\u4e0a\u306b\u3042\u308b\u5168\u3066\u306e\u30e1\u30e2\u30ea\u30bb\u30eb\u306b\u8a18\u9332\u3055\u308c\u305f\u30c7\u30fc\u30bf\u304c\u8aad\u3081\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u8aad\u3081\u306a\u304f\u306a\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u30c7\u30fc\u30bf\u306e\u30b5\u30a4\u30ba\u306f\u3001\u6700\u5927\u3067\u3001\u56f32\u306b\u8a18\u8f09\u306e\u901a\u308a\u3001\u30b7\u30e7\u30fc\u30c8\u3057\u305f\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3\u306e\u679a\u6570\u3092m\u3068\u3059\u308b\u3068\u30014\uff08\u30da\u30fc\u30b8\uff09\u00d716 KiB\u00d7(Y+1)\u00d7m\u3001\u30b7\u30e7\u30fc\u30c8\u3057\u305f\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3\u304c2\u679a\u3067\u3042\u308c\u3070128 KiB\u4ee5\u4e0a\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u3053\u306e\u3088\u3046\u306b\u3001\u5927\u898f\u6a21\u30a8\u30e9\u30fc\u306f\u3001\u3072\u3068\u305f\u3073\u767a\u751f\u3059\u308b\u3068\u30b5\u30a4\u30ba\u306e\u5927\u304d\u3044\u30c7\u30fc\u30bf\u55aa\u5931\u306b\u3064\u306a\u304c\u308b\u3001\u3068\u3044\u3046\u7279\u5fb4\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u3053\u3053\u3067\u3082\u3046\u4e00\u5ea6\u3001\u30e9\u30f3\u30c0\u30e0\u30a8\u30e9\u30fc\u3068\u5927\u898f\u6a21\u30a8\u30e9\u30fc\u306e\u9055\u3044\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-style-default\"><img decoding=\"async\" src=\"https:\/\/testhagisolcojp.gptw.net\/techblog\/wp-content\/uploads\/2023\/06\/errors2.png\" alt=\"\" class=\"wp-image-2901\"\/><figcaption class=\"wp-element-caption\"><em>\u56f33\uff1a\u30e9\u30f3\u30c0\u30e0\u30a8\u30e9\u30fc\u3068\u5927\u898f\u6a21\u30a8\u30e9\u30fc\u306e\u6027\u8cea\u306e\u9055\u3044\uff08\u30a4\u30e1\u30fc\u30b8\uff09\u3068\u9069\u7528\u3059\u308b\u8aa4\u308a\u8a02\u6b63\u65b9\u5f0f<\/em><\/figcaption><\/figure>\n\n\n\n<p>\u3000\u30e9\u30f3\u30c0\u30e0\u30a8\u30e9\u30fc\u306f\u3001ECC\u306e\u7b26\u53f7\u5185\u3067\u3001\u30d3\u30c3\u30c8\u5358\u4f4d\u3067\u304b\u3064\u3069\u306e\u30d3\u30c3\u30c8\u304c\u30a8\u30e9\u30fc\u3092\u8d77\u3053\u3059\u306e\u304b\u304c\u30e9\u30f3\u30c0\u30e0\u306a\u30a8\u30e9\u30fc\u3067\u3059\u3002\u305d\u3057\u3066\u3001\u56f31\u306b\u793a\u3057\u305f\u8981\u7d20\u306e\u84c4\u7a4d\u304c\u539f\u56e0\u3067\u3042\u308b\u305f\u3081\u3001ECC\u7b26\u53f7\u5185\u306e\u8aa4\u308a\u30d3\u30c3\u30c8\u6570\u306f\u30c7\u30fc\u30bf\u3092\u66f8\u304d\u8fbc\u3093\u3067\u304b\u3089\u306e\u7d4c\u904e\u6642\u9593\u304c\u9577\u304f\u306a\u308b\u306b\u3057\u305f\u304c\u3044\u5897\u52a0\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u4e00\u65b9\u5927\u898f\u6a21\u30a8\u30e9\u30fc\u306f\u3001\u30e9\u30f3\u30c0\u30e0\u30a8\u30e9\u30fc\u3068\u7570\u306a\u308a\u3001\u7a81\u767a\u7684\u306b\u767a\u751f\u3057\u3001\u305d\u306e1\u56de\u306e\u30a8\u30e9\u30fc\u767a\u751f\u3067\u8907\u6570\uff08\u591a\u6570\uff09\u30d3\u30c3\u30c8\u304c\u307e\u3068\u3081\u3066\u30c7\u30fc\u30bf\u8aa4\u308a\u3068\u306a\u308b\u30a8\u30e9\u30fc\u3067\u3059\u3002\u8aa4\u308a\u30d3\u30c3\u30c8\u6570\u304c\u6642\u9593\u7d4c\u904e\u306b\u4f9d\u5b58\u3059\u308b\u30e9\u30f3\u30c0\u30e0\u30a8\u30e9\u30fc\u3068\u306f\u5927\u304d\u304f\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u305d\u306e\u4ed6\u3001\u5927\u898f\u6a21\u30a8\u30e9\u30fc\u767a\u751f\u6642\u306b\u30a8\u30e9\u30fc\u3068\u306a\u308b\u30c7\u30fc\u30bf\u306e\u30b5\u30a4\u30ba\u306f\u3001\u30e9\u30f3\u30c0\u30e0\u30a8\u30e9\u30fc\u5411\u3051\u8aa4\u308a\u8a02\u6b63\u7b26\u53f7\u306e\u7b26\u53f7\u9577\u3088\u308a\u3082\u5927\u304d\u304f\u3001\u304b\u3064\u5927\u898f\u6a21\u30a8\u30e9\u30fc\u306e\u767a\u751f\u78ba\u7387\u306f\u3001\u30e9\u30f3\u30c0\u30e0\u30a8\u30e9\u30fc\u306e\u767a\u751f\u78ba\u7387\u3068\u6bd4\u8f03\u3057\u3066\u3068\u3066\u3082\u4f4e\u3044\u3001\u306a\u3069\u306e\u9055\u3044\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 id=\"outline__6_2\" class=\"wp-block-heading\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">SSD\u306e\u5927\u898f\u6a21\u30a8\u30e9\u30fc\u5bfe\u7b56<\/mark><\/h3>\n\n\n\n<p>\u3000SSD\u306e\u5927\u898f\u6a21\u30a8\u30e9\u30fc\u5bfe\u7b56\u306b\u3082\u8aa4\u308a\u8a02\u6b63\u304c\u7528\u3044\u3089\u308c\u307e\u3059\u304c\u3001\u30e9\u30f3\u30c0\u30e0\u30a8\u30e9\u30fc\u5bfe\u7b56\u3068\u3057\u3066\u5099\u3048\u3066\u3044\u308b\u8aa4\u308a\u8a02\u6b63\u7b26\u53f7\u306e\u8a02\u6b63\u80fd\u529b\u3092\u88dc\u5b8c\u3059\u308b\u6a5f\u80fd\u3068\u3057\u3066\u8a2d\u8a08\u3055\u308c\u305f\u3082\u306e\u304c\u3001\u524d\u7bc0\u3067\u8aac\u660e\u3057\u305f\u3088\u3046\u306a\u5927\u898f\u6a21\u30a8\u30e9\u30fc\u306b\u3082\u5bfe\u5fdc\u3067\u304d\u308b\u65b9\u5f0f\u306b\u767a\u5c55\u3057\u305f\u3001\u3068\u3044\u3046\u5074\u9762\u304c\u3042\u308a\u307e\u3059\uff08\u56f34\uff09\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-style-default\"><img decoding=\"async\" src=\"https:\/\/testhagisolcojp.gptw.net\/techblog\/wp-content\/uploads\/2023\/06\/errors3.png\" alt=\"\" class=\"wp-image-2903\"\/><figcaption class=\"wp-element-caption\"><em>\u56f34\uff1a\u5927\u898f\u6a21\u30a8\u30e9\u30fc\u5bfe\u7b56\u304c\u5bfe\u8c61\u3068\u3059\u308b\u7bc4\u56f2\uff08\u30a4\u30e1\u30fc\u30b8\uff09<\/em><\/figcaption><\/figure>\n\n\n\n<p>\u3000\u3068\u3044\u3046\u306e\u3082\u3001\u56f34\u306b\u793a\u3057\u305f\u3088\u3046\u306b\u3001\u30e9\u30f3\u30c0\u30e0\u30a8\u30e9\u30fc\u304c\u539f\u56e0\u306e\u8aa4\u308a\u30d3\u30c3\u30c8\u6570\u3082\u3001\u30e9\u30f3\u30c0\u30e0\u30a8\u30e9\u30fc\u5411\u3051\u8aa4\u308a\u8a02\u6b63\u7b26\u53f7\u306e\u8a02\u6b63\u80fd\u529b\u3092\u8d85\u3048\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308a\u3001\u767a\u751f\u983b\u5ea6\u306e\u9ad8\u3044\u30e9\u30f3\u30c0\u30e0\u30a8\u30e9\u30fc\u306e\u8a02\u6b63\u80fd\u529b\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306b\u3001\u3053\u306e\u9818\u57df\u306e\u30a8\u30e9\u30fc\u3092\u8a02\u6b63\u53ef\u80fd\u306b\u3059\u308b\u3053\u3068\u306e\u307b\u3046\u304c\u91cd\u8981\u3060\u3063\u305f\u304b\u3089\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u4e0a\u8a18\u306e\u3088\u3046\u306a\u80fd\u529b\u304c\u6c42\u3081\u3089\u308c\u308b\u8aa4\u308a\u8a02\u6b63\u7b26\u53f7\u3068\u3057\u3066\u3001\u6700\u8fd1\u306eSSD\u304c\u5099\u3048\u308b\u6a5f\u80fd\u304c\u3001Redundant Arrays of Inexpensive Disks (RAID)\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u305f\u3060\u3057\u3001\u3053\u3053\u3067\u8a00\u3046SSD\u304c\u5099\u3048\u308bRAID\u6a5f\u80fd\u3068\u306f\u30011\u53f0\u306eSSD\u304c\u305d\u306e\u5185\u90e8\u306b\u5099\u3048\u308b\u8907\u6570\u306eNAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u30c1\u30c3\u30d7\u3067\u69cb\u6210\u3059\u308b\u3082\u306e\u3067\u3059\uff08\u56f35 (B)\uff09\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-style-default\"><img decoding=\"async\" src=\"https:\/\/testhagisolcojp.gptw.net\/techblog\/wp-content\/uploads\/2023\/06\/raid-comparison.png\" alt=\"\" class=\"wp-image-2906\"\/><figcaption class=\"wp-element-caption\"><em>\u56f35\uff1aHDD\u3067\u69cb\u6210\u3059\u308bRAID\u3068SSD\u5185\u90e8\u3067\u69cb\u6210\u3059\u308bRAID\u306e\u9055\u3044<\/em><\/figcaption><\/figure>\n\n\n\n<p>\u3000\u56f35 (B)\u306e\u5177\u4f53\u4f8b\u3092\u6319\u3052\u308b\u3068\u3001\u56f36\u306e\u3088\u3046\u306a\u4ed5\u7d44\u307f\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-style-default\"><img decoding=\"async\" src=\"https:\/\/testhagisolcojp.gptw.net\/techblog\/wp-content\/uploads\/2023\/06\/raid-write2.png\" alt=\"\" class=\"wp-image-2909\"\/><figcaption class=\"wp-element-caption\"><em>\u56f36\uff1aSSD\u304c\u5099\u3048\u308bNAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u30c1\u30c3\u30d7\u5358\u4f4d\u3067RAID\u3092\u69cb\u6210\u3059\u308b\u4f8b<\/em><\/figcaption><\/figure>\n\n\n\n<p>\u3000\u30db\u30b9\u30c8\u304b\u3089\u53d7\u9818\u3057\u305f\u30e9\u30a4\u30c8\u30c7\u30fc\u30bf\u3092\u66f8\u304d\u8fbc\u3080\u969b\u306b\u3001\u30c1\u30c3\u30d71\uff5e3\u306b\u66f8\u304d\u8fbc\u3080\u30c7\u30fc\u30bf\u304b\u3089\u30d1\u30ea\u30c6\u30a3\u3092\u8a08\u7b97\u3057\uff08\u56f36\u3067\u306f\u30d3\u30c3\u30c8\u5358\u4f4d\u306e\u6392\u4ed6\u7684\u8ad6\u7406\u548c\uff09\u3001\u305d\u306e\u30d1\u30ea\u30c6\u30a3\u3092\u30c1\u30c3\u30d74\u306b\u66f8\u304d\u8fbc\u307f\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u3053\u306e\u69cb\u6210\u3067\u3001\u30c1\u30c3\u30d73\u306b\u66f8\u304d\u8fbc\u3093\u3060\u30c7\u30fc\u30bfC\u3092\u55aa\u5931\u3057\u305f\u3068\u3057\u307e\u3059\u3002\u305d\u306e\u5834\u5408\u3001\u56f37\u306e\u3088\u3046\u306b\u3057\u3066\u30c7\u30fc\u30bfC\u306b\u751f\u3058\u305f\u8aa4\u308a\u3092\u8a02\u6b63\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-style-default\"><img decoding=\"async\" src=\"https:\/\/testhagisolcojp.gptw.net\/techblog\/wp-content\/uploads\/2023\/06\/raid-recovery2.png\" alt=\"\" class=\"wp-image-2912\"\/><figcaption class=\"wp-element-caption\"><em>\u56f37\uff1a\u56f36\u306e\u69cb\u6210\u3067\u8aa4\u308a\u8a02\u6b63\u3092\u884c\u3046\u4f8b<\/em><\/figcaption><\/figure>\n\n\n\n<p>\u3000\u56f36\u306eRAID\u306f\u30d3\u30c3\u30c8\u5358\u4f4d\u306e\u6392\u4ed6\u7684\u8ad6\u7406\u548c\u3092\u7528\u3044\u305f\u69cb\u6210\u3067\u3059\u306e\u3067\u3001\u30d1\u30ea\u30c6\u30a3\u8a08\u7b97\u306b\u7528\u3044\u305f\u30c7\u30fc\u30bf1\u3064\u5206\u307e\u3067\u8a02\u6b63\uff08\u5fa9\u5143\uff09\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u3053\u306e\u56f36\u306e\u69cb\u6210\u306e\u5834\u5408\u3001RAID\u3092\u69cb\u6210\u3059\u308b\u30c7\u30fc\u30bf\u306e\u4e2d\u3067\u3001\u540c\u3058\u30d3\u30c3\u30c8\u4f4d\u7f6e\u306e\u30c7\u30fc\u30bf\u304c2\u30d3\u30c3\u30c8\u4ee5\u4e0a\u8aa4\u3063\u305f\u5834\u5408\u3084\u3001\u30c7\u30fc\u30bfA\u3068\u30c7\u30fc\u30bfC\u306e2\u3064\u3092\u55aa\u5931\u3057\u305f\u5834\u5408\u306a\u3069\u306f\u3001\u30c7\u30fc\u30bf\u306e\u8aa4\u308a\u3092\u8a02\u6b63\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>\u3000\u524d\u8005\u306b\u3064\u3044\u3066\u306f\u3001NAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u306e\u30d3\u30c3\u30c8\u5358\u4f4d\u306e\u30a8\u30e9\u30fc\u306f\u30e9\u30f3\u30c0\u30e0\u30a8\u30e9\u30fc\u3067\u3042\u308a\u3001RAID\u3092\u69cb\u6210\u3059\u308b\u8907\u6570\u30c7\u30fc\u30bf\u306e\u540c\u3058\u30d3\u30c3\u30c8\u4f4d\u7f6e\u306e\u30c7\u30fc\u30bf\u304c\u30e9\u30f3\u30c0\u30e0\u30a8\u30e9\u30fc\u8d77\u56e0\u3067\u540c\u6642\u306b\u30a8\u30e9\u30fc\u3068\u306a\u308b\uff08\u30e9\u30f3\u30c0\u30e0\u30a8\u30e9\u30fc\u5411\u3051\u8aa4\u308a\u8a02\u6b63\u3067\u3082\u8a02\u6b63\u3067\u304d\u306a\u3044\uff09\u78ba\u7387\u306f\u4f4e\u3044\u3068\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u307e\u305f\u5f8c\u8005\u306b\u3064\u3044\u3066\u306f\u3001RAID\u306e\u69cb\u6210\u3092\u5de5\u592b\u3057\u3066\u3001\u5927\u898f\u6a21\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u3066\u3082RAID\u3092\u69cb\u6210\u3059\u308b\u8907\u6570\u30c7\u30fc\u30bf\u306e\u3046\u3061\u8aa4\u308a\u8a02\u6b63\u306b\u5fc5\u8981\u306a\u30c7\u30fc\u30bf\u304c\u6b8b\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002[1]\u306e\u8cc7\u6599\u3082\u305d\u306e\u3088\u3046\u306a\u5de5\u592b\u306b\u3064\u3044\u3066\u306e\u8b1b\u6f14\u306e\u8cc7\u6599\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3000\u3053\u306e\u3088\u3046\u306b\u3001SSD\u306f\u3001\u88fd\u54c1\u4fdd\u8a3c\u671f\u9593\uff08\u5bff\u547d\uff09\u4e2d\u306b\u767a\u751f\u3059\u308b\u78ba\u7387\u304c\u4f4e\u3044\u4e8b\u8c61\u3082\u542b\u3081\u3066\u3001\u30c7\u30fc\u30bf\u55aa\u5931\u3092\u9632\u3050\u305f\u3081\u306e\u6a5f\u80fd\u3092\u5099\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 id=\"outline__7\" class=\"wp-block-heading\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u304a\u308f\u308a\u306b<\/mark><\/h2>\n\n\n\n<p>\u3000\u4eca\u56de\u306e\u8a18\u4e8b\u3067\u306f\u3001\u300c\u4fdd\u8a3c\u66f8\u304d\u63db\u3048\u56de\u6570\u300d\u4ee5\u5916\u306eNAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u306e\u4fe1\u983c\u6027\u4e0a\u306e\u5236\u7d04\u306b\u3064\u3044\u3066\u3001SSD\u3067\u306e\u5bfe\u5fdc\u65b9\u6cd5\u3092\u542b\u3081\u3066\u3054\u8aac\u660e\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u3000\u305d\u308c\u3089\u5236\u7d04\u306e\u4e00\u4f8b\u3068\u3057\u3066\u3001\u300c\u5927\u898f\u6a21\u30a8\u30e9\u30fc\u300d\u306b\u5206\u985e\u3055\u308c\u308b3D NAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u306b\u304a\u3051\u308b\u30ef\u30fc\u30c9\u30e9\u30a4\u30f3\u306e\u30aa\u30fc\u30d7\u30f3\uff08\u958b\u653e\uff09\u3084\u30b7\u30e7\u30fc\u30c8\uff08\u77ed\u7d61\uff09\u3092\u6319\u3052\u3066\u3001\u305d\u306e\u5bfe\u7b56\u3082\u542b\u3081\u3066\u3054\u8aac\u660e\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u3000NAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u3092\u4e0d\u63ee\u767a\u6027\u8a18\u61b6\u5a92\u4f53\u3068\u3059\u308bSSD\u3067\u306f\u3001\u88fd\u54c1\u306e\u5bff\u547d\u3001\u88fd\u54c1\u306e\u4fe1\u983c\u6027\u3001\u3068\u3044\u3046\u8996\u70b9\u306b\u304a\u3044\u3066\u3001\u30e1\u30e2\u30ea\u30bb\u30eb\u306e\u300c\u4fdd\u8a3c\u66f8\u304d\u63db\u3048\u56de\u6570\u300d\u304c\u6700\u3082\u91cd\u8981\u306a\u5236\u7d04\u306e\u3072\u3068\u3064\u3067\u3042\u308b\u3053\u3068\u306f\u9593\u9055\u3044\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u8fd1\u5e74\u3067\u306f\u305d\u308c\u4ee5\u5916\u306e\u69d8\u3005\u306a\u5236\u7d04\u3078\u306e\u5bfe\u5fdc\u306e\u91cd\u8981\u5ea6\u304c\u5897\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 id=\"outline__8\" class=\"wp-block-heading\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">References<\/mark><\/h2>\n\n\n\n<p>[1] Lin,&nbsp;<em>&#8220;Error Handling Technologies for QLC-Based Storage System&#8221;<\/em>, Flash Memory Summit 2019, Santa Clara, CA, August 2019<\/p>\n\n\n\n<h2 id=\"outline__9\" class=\"wp-block-heading\" id=\"outline__8\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u4ed6\u793e\u5546\u6a19\u306b\u3064\u3044\u3066<\/mark><\/h2>\n\n\n\n<p>\u3000\u8a18\u4e8b\u4e2d\u306b\u306f\u767b\u9332\u5546\u6a19\u30de\u30fc\u30af\u3092\u660e\u8a18\u3057\u3066\u304a\u308a\u307e\u305b\u3093\u304c\u3001\u8a18\u4e8b\u306b\u63b2\u8f09\u3055\u308c\u3066\u3044\u308b\u4f1a\u793e\u540d\u304a\u3088\u3073\u88fd\u54c1\u540d\u7b49\u306f\u4e00\u822c\u306b\u5404\u793e\u306e\u5546\u6a19\u307e\u305f\u306f\u767b\u9332\u5546\u6a19\u3067\u3059\u3002<\/p>\n\n\n\n<h2 id=\"outline__10\" class=\"wp-block-heading\" id=\"outline__9\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">\u8a18\u4e8b\u5185\u5bb9\u306b\u3064\u3044\u3066<\/mark><\/h2>\n\n\n\n<p>\u3000\u3053\u306e\u8a18\u4e8b\u306e\u5185\u5bb9\u306f\u3001\u767a\u8868\u5f53\u6642\u306e\u60c5\u5831\u3067\u3059\u3002\u4e88\u544a\u306a\u304f\u5909\u66f4\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u3042\u3089\u304b\u3058\u3081\u3054\u4e86\u627f\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>SSD\u306f\u3001\u66f8\u304d\u63db\u3048\u56de\u6570\u4ee5\u5916\u306b\u3082\u69d8\u3005\u306aNAND\u30d5\u30e9\u30c3\u30b7\u30e5\u30e1\u30e2\u30ea\u306e\u4fe1\u983c\u6027\u4e0a\u306e\u5236\u7d04\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u305d\u306e\u3072\u3068\u3064\u3092\u3054\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"author":4,"featured_media":2361,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[23,24,35],"class_list":["post-2877","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-reliability","tag-nvme-ssd","tag-sata-ssd","tag-35"],"_links":{"self":[{"href":"https:\/\/testhagisolcojp.gptw.net\/techblog\/index.php?rest_route=\/wp\/v2\/posts\/2877","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/testhagisolcojp.gptw.net\/techblog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/testhagisolcojp.gptw.net\/techblog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/testhagisolcojp.gptw.net\/techblog\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/testhagisolcojp.gptw.net\/techblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2877"}],"version-history":[{"count":45,"href":"https:\/\/testhagisolcojp.gptw.net\/techblog\/index.php?rest_route=\/wp\/v2\/posts\/2877\/revisions"}],"predecessor-version":[{"id":4189,"href":"https:\/\/testhagisolcojp.gptw.net\/techblog\/index.php?rest_route=\/wp\/v2\/posts\/2877\/revisions\/4189"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/testhagisolcojp.gptw.net\/techblog\/index.php?rest_route=\/wp\/v2\/media\/2361"}],"wp:attachment":[{"href":"https:\/\/testhagisolcojp.gptw.net\/techblog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2877"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/testhagisolcojp.gptw.net\/techblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2877"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/testhagisolcojp.gptw.net\/techblog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2877"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}