\u305d\u3046\u3044\u3084 Linux \u306e LVM \u3084 RAID \u3063\u3066\u3069\u3046\u306a\u3063\u3066\u308b\u3093\u3060\u3063\u3051\u3001\u3068\u601d\u3063\u3066\u8abf\u3079\u3066\u305f\u3068\u3053\u308d\u3001\u30a4\u30de\u30c9\u30ad\u306e Linux \u306f RAID1\/RAID5 \u306a\u3089\u30e1\u30f3\u30d0\u306e\u30c7\u30d0\u30a4\u30b9\u306e\u6570\u3092\u30aa\u30f3\u30e9\u30a4\u30f3\u3067\uff08= RAID \u3092\u505c\u6b62\u3055\u305b\u305a\u306b\uff09\u5909\u66f4\u3059\u308b\uff08\u3053\u308c\u3092 reshape \u3068\u8a00\u3046\uff09\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u3067\u3059\u306d\u3002\u7279\u306b\u500b\u4eba\u30e6\u30fc\u30b9\u306a\u3089 HDD \u3092\u5c11\u3057\u305a\u3064\u8cb7\u3044\u8db3\u3057\u3066\u5bb9\u91cf\u3092\u5897\u3084\u3057\u3066\u3044\u304f\u3001\u3068\u3044\u3046\u3053\u3068\u3092\u3084\u308a\u305f\u304f\u306a\u308b\u306e\u3067\u3001RAID \u3067\u3053\u306e\u6a5f\u80fd\u304c\u4f7f\u3048\u308b\u3068\u975e\u5e38\u306b\u3046\u308c\u3057\u3044\u3068\u3053\u308d\u3067\u3059\u3002<\/p>\n
<\/p>\n
\u3068\u3044\u3046\u308f\u3051\u3067\u5b9f\u9a13\u3002<\/p>\n
\n[root@linuxraidtest ~]# mdadm --create \/dev\/md0 --level 5 --raid-devices 3 \/dev\/sd[abc]1\r\nmdadm: array \/dev\/md0 started.\r\n[root@linuxraidtest ~]# mkfs.ext3 -q \/dev\/md0\r\n[root@linuxraidtest ~]# mount \/dev\/md0 \/mnt<\/pre>\n<\/blockquote>\n\u3067\u306f\u66f8\u304d\u8fbc\u307f\u306a\u304c\u3089 reshape \u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\n[root@linuxraidtest ~]# dd if=\/dev\/zero of=\/mnt\/fill.dat bs=1MiB &\r\n[1] 2068\r\n[root@linuxraidtest ~]# mdadm --grow \/dev\/md0 --raid-devices 4\r\nmdadm: Need to backup 384K of critical section..\r\nmdadm: ... critical section passed.\r\n[root@linuxraidtest ~]# cat \/proc\/mdstat\r\nPersonalities : [raid6] [raid5] [raid4] \r\nmd0 : active raid5 sdd1[3] sdc1[2] sdb1[1] sda1[0]\r\n 2088192 blocks super 0.91 level 5, 64k chunk, algorithm 2 [4\/4] [UUUU]\r\n [=>...................] reshape = 5.7% (61380\/1044096) finish=18.2min speed=896K\/sec\r\n \r\nunused devices: <none>\r\n[root@linuxraidtest ~]# fg\r\ndd if=\/dev\/zero of=\/mnt\/fill.dat bs=1MiB<\/pre>\n<\/blockquote>\n\u3082\u306e\u3059\u3054\u30fc\u304f\u9045\u304f\u306a\u308a\u307e\u3059\u304c\u3001\u305d\u308c\u4ee5\u5916\u306f\u3054\u304f\u666e\u901a\u306b\u52d5\u3044\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n
\u3055\u3066\u3001md(4) \u3084 mdadm(8) \u306e man \u30da\u30fc\u30b8\u3092\u8aad\u3080\u3068\u3001reshape \u4e2d\u306b\u30af\u30e9\u30c3\u30b7\u30e5\u3057\u3066\u3082\u518d\u8d77\u52d5\u6642\u306b reshape \u3092\u518d\u958b\u3057\u3066\u3057\u304b\u3082\u30c7\u30fc\u30bf\u306f\u4fdd\u5b58\u3055\u308c\u308b\u307f\u305f\u3044\u306a\u3053\u3068\u3092\u66f8\u3044\u3066\u3042\u308b\u306e\u3067\u3001reshape \u4e2d\u306b degrade \u3055\u305b\u3066\u96fb\u30d7\u30c1\u3001\u3068\u304b\u3044\u3046\u610f\u5730\u60aa\u306a\u3053\u3068\u3092\u3084\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u307e\u305a\u3001\u30c7\u30fc\u30bf\u304c\u4fdd\u5b58\u3055\u308c\u3066\u308b\u304b\u3069\u3046\u304b\u306e\u30c1\u30a7\u30c3\u30af\u7528\u306b\u3001\/dev\/urandom \u304b\u3089\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u3063\u3066\u3001\u305d\u308c\u3092 \/dev\/md0 \u306b\u66f8\u3044\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n
\n[root@linuxraidtest ~]# dd if=\/dev\/urandom of=check.dat bs=1MiB count=3000\r\n3000+0 records in\r\n3000+0 records out\r\n3145728000 bytes (3.1 GB) copied, 634.43 seconds, 5.0 MB\/s\r\n[root@linuxraidtest ~]# dd if=check.dat of=\/dev\/md0 bs=1MiB\r\n3000+0 records in\r\n3000+0 records out\r\n3145728000 bytes (3.1 GB) copied, 279.607 seconds, 11.3 MB\/s<\/pre>\n<\/blockquote>\n\u3093\u3067 reshape \u958b\u59cb\u3002<\/p>\n
\n[root@linuxraidtest ~]# mdadm --manage \/dev\/md0 --add \/dev\/sde1\r\nmdadm: added \/dev\/sde1\r\n[root@linuxraidtest ~]# mdadm --grow \/dev\/md0 --raid-devices 5\r\nmdadm: Need to backup 768K of critical section..\r\nmdadm: ... critical section passed.\r\n[root@linuxraidtest ~]# cat \/proc\/mdstat\r\nPersonalities : [raid6] [raid5] [raid4] \r\nmd0 : active raid5 sde1[4] sdd1[3] sdc1[2] sdb1[1] sda1[0]\r\n 3132288 blocks super 0.91 level 5, 64k chunk, algorithm 2 [5\/5] [UUUUU]\r\n [>....................] reshape = 2.6% (28608\/1044096) finish=7.0min speed=2384K\/sec\r\n \r\nunused devices: <none>\r\n[root@linuxraidtest ~]# mdadm --manage \/dev\/md0 --fail \/dev\/sda1\r\nmdadm: set \/dev\/sda1 faulty in \/dev\/md0<\/pre>\n<\/blockquote>\n\u3042\u308c\u3001degrade \u3055\u305b\u305f\u3089\u30c7\u30a3\u30b9\u30af\u30a2\u30af\u30bb\u30b9\u304c\u6b62\u307e\u3063\u305f\u2026<\/p>\n
\n[root@linuxraidtest ~]# cat \/proc\/mdstat\r\nPersonalities : [raid6] [raid5] [raid4] \r\nmd0 : active raid5 sde1[4] sdd1[3] sdc1[2] sdb1[1] sda1[5](F)\r\n 3132288 blocks super 0.91 level 5, 64k chunk, algorithm 2 [5\/4] [_UUUU]\r\n \r\nunused devices: <none><\/pre>\n<\/blockquote>\n\u3080\u3080\u3080\uff1freshaping \u304c\u4e2d\u65ad\u3055\u308c\u305f\uff1f<\/p>\n
\u3068\u308a\u3042\u3048\u305a\u898b\u306a\u304b\u3063\u305f\u3053\u3068\u306b\u3057\u3066\uff08\u304a\u3044\uff09\u96fb\u30d7\u30c1\u2026 & \u518d\u8d77\u52d5<\/p>\n
\n[root@linuxraidtest ~]# cat \/proc\/mdstat\r\nPersonalities : [raid6] [raid5] [raid4] \r\nmd0 : active raid5 sde1[4] sdd1[3] sdc1[2] sdb1[1]\r\n 3132288 blocks super 0.91 level 5, 64k chunk, algorithm 2 [5\/4] [_UUUU]\r\n [====>................] reshape = 22.2% (233284\/1044096) finish=5.3min speed=2507K\/sec\r\n \r\nunused devices: <none><\/pre>\n<\/blockquote>\n\u3061\u3083\u3093\u3068 reshape \u3082\u518d\u958b\u3057\u3066\u3044\u308b\u3088\u3046\u3067\u3059\u3002\u3067\u3001\u5b8c\u4e86\u3057\u3066\u304b\u3089\u4e2d\u8eab\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3068\u3001<\/p>\n
\n[root@linuxraidtest ~]# dd if=\/dev\/md0 bs=1MiB count=3000 | cmp \/dev\/stdin check.dat; echo $?\r\n3000+0 records in\r\n3000+0 records out\r\n3145728000 bytes (3.1 GB) copied, 411.267 seconds, 7.6 MB\/s\r\n0<\/pre>\n<\/blockquote>\n\u30c7\u30fc\u30bf\u306f\u4fdd\u5b58\u3055\u308c\u3066\u3044\u308b\u6a21\u69d8\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u305d\u3046\u3044\u3084 Linux \u306e LVM \u3084 RAID \u3063\u3066\u3069\u3046\u306a\u3063\u3066\u308b\u3093\u3060\u3063\u3051\u3001\u3068\u601d\u3063\u3066\u8abf\u3079\u3066\u305f\u3068\u3053\u308d\u3001\u30a4\u30de\u30c9\u30ad\u306e Linux \u306f RAID1\/RAID5 \u306a\u3089\u30e1\u30f3\u30d0\u306e\u30c7\u30d0\u30a4\u30b9\u306e\u6570\u3092\u30aa\u30f3\u30e9\u30a4\u30f3\u3067\uff08= RAID \u3092\u505c\u6b62\u3055\u305b\u305a\u306b\uff09 […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-43","post","type-post","status-publish","format-standard","hentry","category-software"],"_links":{"self":[{"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/43","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=43"}],"version-history":[{"count":0,"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/43\/revisions"}],"wp:attachment":[{"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=43"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=43"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/umezawa.dyndns.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=43"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}