{"id":171,"date":"2019-07-26T16:28:15","date_gmt":"2019-07-26T08:28:15","guid":{"rendered":"http:\/\/www.h540305.idv.tw\/?p=171"},"modified":"2026-03-17T11:45:28","modified_gmt":"2026-03-17T03:45:28","slug":"centos-6-9x64-raid-5","status":"publish","type":"post","link":"https:\/\/www.techx.idv.tw\/index.php\/2019\/07\/26\/centos-6-9x64-raid-5\/","title":{"rendered":"\u77e5\u8b58\u65b9\u821f E \u555f\u822a – \u5728 CentOS 6.9X64 \u4e0a\u4f7f\u7528 RAID 5"},"content":{"rendered":"\n

\u5728<\/strong> CentOS 6.9X64\n<\/strong>\u4e0a\u4f7f\u7528<\/strong> RAID 5<\/strong><\/p>\n\n\n\n

\u661f\u671f\u4e94, 23\u516d\u67082017
1. \u5b89\u88dd mdadm \u5957\u4ef6 
# yum install mdadm 
2. \u67e5\u770b\u76ee\u524d\u78c1\u789f\u72c0\u614b 
# fdisk -l | grep ‘Disk \/dev\/sd’ 
Disk \/dev\/sda: 10.7 GB, 10737418240 bytes 
Disk \/dev\/sdb: 21.5 GB, 21474836480 bytes 
Disk \/dev\/sdc: 21.5 GB, 21474836480 bytes 
Disk \/dev\/sdd: 21.5 GB, 21474836480 bytes 
Disk \/dev\/sde: 21.5 GB, 21474836480 bytes <\/p>\n\n\n\n

3. \u5efa\u7acb\u78c1\u789f\u5206\u5272\u5340 
# fdisk \/dev\/sdb  <\/p>\n\n\n\n

\u91cd\u8907\u4e0a\u9762\u7684\u52d5\u4f5c\uff0c\u5b8c\u6210\u6240\u6709\u7684\u78c1\u789f 
\n# fdisk \/dev\/sdc 
\n# fdisk \/dev\/sdd 
\n# fdisk \/dev\/sde 
\n
\n4. \u5efa\u7acb \/dev\/md0 \u78c1\u789f\u9663\u5217\u5206\u5272\u5340
\n# mdadm –create\n–verbose –auto=yes \/dev\/md0 –level=5 –raid-devices=4 \/dev\/sd[b-e]
\nmdadm: layout\ndefaults to left-symmetric
\nmdadm: layout\ndefaults to left-symmetric
\nmdadm: chunk size\ndefaults to 512K
\nmdadm: \/dev\/sdb\nappears to be part of a raid array:
\n      \nlevel=raid0 devices=0 ctime=Thu Jan  1 08:00:00 1970<\/p>\n\n\n\n


\nmdadm: partition\ntable exists on \/dev\/sdb but will be lost or
\n      \nmeaningless after creating array
\nmdadm: \/dev\/sdc\nappears to be part of a raid array:
\n      \nlevel=raid0 devices=0 ctime=Thu Jan  1 08:00:00 1970
\nmdadm: partition\ntable exists on \/dev\/sdc but will be lost or
\n      \nmeaningless after creating array
\nmdadm: \/dev\/sdd\nappears to be part of a raid array:
\n      \nlevel=raid0 devices=0 ctime=Thu Jan  1 08:00:00 1970
\nmdadm: partition\ntable exists on \/dev\/sdd but will be lost or
\n      \nmeaningless after creating array
\nmdadm: \/dev\/sde\nappears to be part of a raid array:
\n      \nlevel=raid0 devices=0 ctime=Thu Jan  1 08:00:00 1970
\nmdadm: partition\ntable exists on \/dev\/sde but will be lost or
\n      \nmeaningless after creating array
\nmdadm: size set\nto 20955136K
\nContinue creating\narray? yes
\nmdadm: Defaulting\nto version 1.2 metadata
\nmdadm: array\n\/dev\/md0 started.
\n
\n5. \u67e5\u770b\u5efa\u7f6e\u7d50\u679c
\n# fdisk -l |\ngrep \/dev\/md0<\/p>\n\n\n\n


\nDisk \/dev\/md0: 64.4 GB,\n64374177792 bytes
\n
\n# cat \/proc\/mdstat
\nPersonalities :\n<\/p>\n\n\n

[raid6]<\/p>\n\n\n\n

[raid5] [raid4]
\nmd0 : active\nraid5 sde[4] sdd[2] sdc[1] sdb[0]
\n     \n62865408 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4\/3] [UUU_]
\n     \n[>………………..]  recovery =  2.8% (607044\/20955136)\nfinish=6.7min speed=50587K\/sec

\nunused devices:\n<none>

\n# mdadm -D \/dev\/md0
\n\/dev\/md0:
\n       \nVersion : 1.2
\n  Creation\nTime : Wed Jun 29 08:16:51 2016
\n    \nRaid Level : raid5
\n    \nArray Size : 62865408 (59.95 GiB 64.37 GB)
\n  Used Dev\nSize : 20955136 (19.98 GiB 21.46 GB)
\n   Raid\nDevices : 4
\n  Total\nDevices : 4
\n   \nPersistence : Superblock is persistent

\n   \nUpdate Time : Wed Jun 29 08:17:14 2016
\n         \nState : clean, degraded, recovering
\n Active\nDevices : 3
\nWorking Devices :\n4
\n Failed\nDevices : 0
\n  Spare Devices : 1

\n        \nLayout : left-symmetric
\n    \nChunk Size : 512K

\n Rebuild\nStatus : 6% complete

\n          \nName : localhost.localdomain:0  (local to host localhost.localdomain)
\n          \nUUID : 17b9df4d:e3542df5:34c1a172:298a07a5
\n        \nEvents : 2

\n   \nNumber   Major   Minor   RaidDevice State
\n      \n0       8      \n16        0     \nactive sync   \/dev\/sdb
\n      \n1       8      \n32        1     \nactive sync   \/dev\/sdc
\n      \n2       8      \n48        2     \nactive sync   \/dev\/sdd
\n      \n4       8      \n64        3     \nspare rebuilding   \/dev\/sde

\n6. \u683c\u5f0f\u5316\u5206\u5272\u5340
\n# mkfs -t ext4\n\/dev\/md0
\nmke2fs 1.41.12\n(17-May-2010)
\nFilesystem label=
\nOS type: Linux
\nBlock size=4096\n(log=2)
\nFragment\nsize=4096 (log=2)
\nStride=128\nblocks, Stripe width=384 blocks
\n3932160 inodes,\n15716352 blocks
\n785817 blocks\n(5.00%) reserved for the super user
\nFirst data\nblock=0
\nMaximum\nfilesystem blocks=4294967296
\n480 block groups
\n32768 blocks per\ngroup, 32768 fragments per group
\n8192 inodes per\ngroup\n\n<\/p>\n\n\n\n

Superblock backups stored on blocks:
\n       \n32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
\n       \n4096000, 7962624, 11239424
\nWriting inode\ntables: done
\nCreating journal\n(32768 blocks): done
\nWriting\nsuperblocks and filesystem accounting information: done
\nThis filesystem\nwill be automatically checked every 35 mounts or
\n180 days,\nwhichever comes first.  Use tune2fs -c or -i to override.<\/p>\n\n\n\n


\n7. \u5efa\u7acb\u639b\u8f09\u76ee\u9304\u4e26\u639b\u8f09 
\n# mkdir \/home\/RAID5
\n# mount \/dev\/md0 \/home\/RAID5
\n# df -h
\nFilesystem           \nSize  Used Avail Use% Mounted on<\/p>\n\n\n\n


\n\/dev\/mapper\/VolGroup-lv_root
\n                     \n8.3G 1022M  6.9G  13% \/
\ntmpfs                \n931M     0  931M   0% \/dev\/shm
\n\/dev\/sda1            \n477M   63M  389M  14% \/boot
\n\/dev\/md0              \n59G   52M   56G   1% \/home\/RAID5
\n8. \u67e5\u770b\u786c\u789f\u7684 UUID 
\n# blkid | grep\n\/dev\/md0
\n\/dev\/md0:\nUUID=”a24bbe2b-c0f1-4417-99d9-866ea1f2a33d<\/em><\/strong>”\nTYPE=”ext4″
\n9. \u7528 vim \u6216 gedit\u4fee\u6539 \/etc\/fstab 
\n# vim(gedit) \/etc\/fstab 
\n\u52a0\u5165\u4e0b\u9762\u4e00\u884c<\/p>\n\n\n\n

UUID=a24bbe2b-c0f1-4417-99d9-866ea1f2a33d<\/em><\/strong> \u00a0\/home\/RAID5\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ext4\u00a0\u00a0\u00a0 defaults\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1 1
10. \u7de8\u8f2f\u00a0\/etc\/mdadm.conf\u00a0 \u8a2d\u5b9a\u6a94\u00a0(\u5f8c\u8981\u7528 vim \u6216 gedit \u6253\u958b\u67e5\u770b)
#\u00a0mdadm –detail –scan –verbose >> \/etc\/mdadm.conf
ARRAY \/dev\/md0 level=raid5 num-devices=4 metadata=1.2 name=localhost.localdomain:0 UUID=232bc54c:6583d975:ab90c836:78be7854
\u00a0\u00a0 devices=\/dev\/sdb,\/dev\/sdc,\/dev\/sdd,\/dev\/sde
11. \u91cd\u65b0\u555f\u52d5\u96fb\u8166
#\u00a0sync;sync;reboot

12. \u78c1\u789f\u5206\u5272\u8cc7\u8a0a
#\u00a0fdisk -l | grep \/dev\/sd
Disk \/dev\/sda: 10.7 GB, 10737418240 bytes
\/dev\/sda1\u00a0\u00a0 *\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 64\u00a0\u00a0\u00a0\u00a0\u00a0 512000\u00a0\u00a0 83\u00a0 Linux
\/dev\/sda2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 64\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1306\u00a0\u00a0\u00a0\u00a0 9972736\u00a0\u00a0 8e\u00a0 Linux LVM
Disk \/dev\/sdb: 21.5 GB, 21474836480 bytes
\/dev\/sdb1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 2610\u00a0\u00a0\u00a0 20964793+\u00a0\u00a0fd\u00a0 Linux raid autodetect
Disk \/dev\/sdc: 21.5 GB, 21474836480 bytes
\/dev\/sdc1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 2610\u00a0\u00a0\u00a0 20964793+\u00a0\u00a0fd\u00a0 Linux raid autodetect
Disk \/dev\/sdd: 21.5 GB, 21474836480 bytes
\/dev\/sdd1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 2610\u00a0\u00a0\u00a0 20964793+\u00a0\u00a0fd\u00a0 Linux raid autodetect
Disk \/dev\/sde: 21.5 GB, 21474836480 bytes
\/dev\/sde1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 2610\u00a0\u00a0\u00a0 20964793+\u00a0\u00a0fd\u00a0 Linux raid autodetect

13. \u6aa2\u67e5\u662f\u5426\u6709\u6b63\u78ba\u639b\u8f09
#\u00a0df -h
Filesystem\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Size\u00a0 Used Avail Use% Mounted on
\/dev\/mapper\/VolGroup-lv_root
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 8.3G 1022M\u00a0 6.9G\u00a0 13% \/
tmpfs\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 931M\u00a0\u00a0\u00a0\u00a0 0\u00a0 931M\u00a0\u00a0 0% \/dev\/shm
\/dev\/sda1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 477M\u00a0\u00a0 63M\u00a0 389M\u00a0 14% \/boot
\/dev\/md0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 59G\u00a0\u00a0 52M\u00a0\u00a0 56G\u00a0\u00a0 1% \/home\/RAID5<\/p>\n\n\n\n

\u77e5\u8b58\u65b9\u821f E \u555f\u822a – \u5728 CentOS 6.9X64 \u4e0a\u4f7f\u7528 RAID 5<\/b><\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

\u5728 CentOS 6.9X64 \u4e0a\u4f7f\u7528 RAID 5 \u661f\u671f\u4e94, 23\u516d\u67082017 1. \u5b89\u88dd mdadm \u5957\u4ef6 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[9],"tags":[149],"class_list":["post-171","post","type-post","status-publish","format-standard","hentry","category-editors-notes","tag-centos-6-9x64-raid-5"],"blocksy_meta":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"_links":{"self":[{"href":"https:\/\/www.techx.idv.tw\/index.php\/wp-json\/wp\/v2\/posts\/171","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.techx.idv.tw\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.techx.idv.tw\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.techx.idv.tw\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.techx.idv.tw\/index.php\/wp-json\/wp\/v2\/comments?post=171"}],"version-history":[{"count":1,"href":"https:\/\/www.techx.idv.tw\/index.php\/wp-json\/wp\/v2\/posts\/171\/revisions"}],"predecessor-version":[{"id":20540,"href":"https:\/\/www.techx.idv.tw\/index.php\/wp-json\/wp\/v2\/posts\/171\/revisions\/20540"}],"wp:attachment":[{"href":"https:\/\/www.techx.idv.tw\/index.php\/wp-json\/wp\/v2\/media?parent=171"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techx.idv.tw\/index.php\/wp-json\/wp\/v2\/categories?post=171"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techx.idv.tw\/index.php\/wp-json\/wp\/v2\/tags?post=171"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}