![\"\"](\"http:\/\/www.danios.com\/wp-content\/uploads\/2021\/09\/image-27.png\")
<\/figure>\n\n\n\nRAID01:\u5148\u505a\u6761\u5e26\u518d\u505a\u955c\u50cf\uff0c<\/p>\n\n\n\n
\u6027\u80fd\u8868\u73b0\uff1a\u8bfb\u3001\u5199\u63d0\u5347<\/p>\n\n\n\n
\u5197\u4f59\u80fd\u529b\uff1a\u6709<\/p>\n\n\n\n
\u7a7a\u95f4\u5229\u7528\u7387\uff1aN*min(S1,S2,\u2026)\/2<\/p>\n\n\n\n
\u81f3\u5c11\u9700\u89814\u5757<\/p>\n\n\n\n RAID50:\uff08\u5148\u505aRAID5\uff0c\u518d\u505aRAID0\uff09<\/p>\n\n\n\n \u6027\u80fd\u8868\u73b0\uff1a\u8bfb\u3001\u5199\u63d0\u5347<\/p>\n\n\n\n \u5197\u4f59\u80fd\u529b\uff1a\u6709<\/p>\n\n\n\n \u7a7a\u95f4\u5229\u7528\u7387\uff1a(N-2)\/N*min(S1,S2,\u2026)\/2<\/p>\n\n\n\n \u81f3\u5c11\u9700\u89816\u5757<\/p>\n\n\n\n RAID7<\/p>\n\n\n\n jbod:\u5c06\u591a\u4e2a\u5c0f\u76d8\u7ec4\u6210\u4e00\u4e2a\u5927\u76d8<\/p>\n\n\n\n \u6027\u80fd\u8868\u73b0\uff1a\u65e0\u63d0\u5347<\/p>\n\n\n\n \u5197\u4f59\u80fd\u529b\uff1a\u65e0<\/p>\n\n\n\n \u7a7a\u95f4\u5229\u7528\u7387\uff1a100%(SUM(S1,S2\u2026..))<\/p>\n\n\n\n \u81f3\u5c11\u9700\u89812\u5757<\/p>\n\n\n\n \u5e38\u7528\u7ea7\u522b\uff1aRAID0\uff0cRAID1\uff0cRAID5\uff0cRAID10\uff0cRAID50\uff0cJBOD<\/p>\n\n\n\n 27.3 RAID\u5b9e\u73b0<\/p>\n\n\n\n 27.3.1 \u786c\u4ef6RAID<\/p>\n\n\n\n \u5728\u4e3b\u677f\u4e0a\u6709\u4e2aRAID\u63a7\u5236\u5668\uff0c\u901a\u8fc7BIOS\u8fdb\u884c\u63a7\u5236\u66f4\u6539<\/p>\n\n\n\n 27.3.2 \u8f6f\u4ef6RAID<\/p>\n\n\n\n \u901a\u8fc7\u5185\u6838\u4e2d\u7684md\u6a21\u5757\u6765\u624b\u52a8\u914d\u7f6eRAID<\/p>\n\n\n\n md:multi disks\/devices<\/p>\n\n\n\n \u8f6fRAID\u8bbe\u5907\u5fc5\u987b\u88ab\u6807\u8bc6\u4e3afd\u7c7b\u578b\uff0c\u907f\u514d\u7cfb\u7edf\u5d29\u6e83\u4ee5\u540eRAID\u8bbe\u5907\u65e0\u6cd5\u518d\u8bbf\u95ee<\/p>\n\n\n\n \/proc\/mdstat:\u663e\u793a\u5f53\u524d\u7cfb\u7edf\u6240\u6709\u542f\u52a8\u7684RAID<\/p>\n\n\n\n \u903b\u8f91RIAD\uff1a<\/p>\n\n\n\n \/dev\/md0<\/p>\n\n\n\n \/dev\/md1<\/p>\n\n\n\n mdadm\uff08md\u7ba1\u7406\u5668\uff09:<\/p>\n\n\n\n \u5c06\u4efb\u4f55\u5757\u8bbe\u5907\u505a\u6210RAID\uff08\u540c\u4e00\u5757\u786c\u76d8\u4e24\u4e2a\u5206\u533a\u4e5f\u53ef\u4ee5\u505a\uff0c\u4f46\u6ca1\u6709\u6027\u80fd\u63d0\u5347\u7684\u610f\u4e49\uff09<\/p>\n\n\n\n \u652f\u6301\u7684RAID\u7ea7\u522b\uff1aLINEAR\uff0cRAID0\uff0cRAID1\uff0cRAID4,RAID5,RAID6,RAID10\u7b49<\/p>\n\n\n\n \u6a21\u5f0f\u5316\u7684\u547d\u4ee4\uff1a<\/p>\n\n\n\n \u521b\u5efa\u6a21\u5f0f<\/p>\n\n\n\n -C<\/p>\n\n\n\n \u4e13\u7528\u9009\u9879\uff1a<\/p>\n\n\n\n -l: \u6307\u660e\u8981\u521b\u5efa\u7684RAID\u7ea7\u522b<\/p>\n\n\n\n -n #: \u8bbe\u5907\u4e2a\u6570<\/p>\n\n\n\n -a {yes|no}: \u662f\u5426\u81ea\u52a8\u4e3a\u5176\u521b\u5efa\u8bbe\u5907\u6587\u4ef6<\/p>\n\n\n\n -c: \u6307\u5b9aCHUNK\uff08\u6761\u5e26\uff09\u5927\u5c0f, 2^n\uff0c\u9ed8\u8ba4\u4e3a64K<\/p>\n\n\n\n -x #: \u6307\u5b9a\u7a7a\u95f2\u76d8\u4e2a\u6570<\/p>\n\n\n\n \u7ba1\u7406\u6a21\u5f0f<\/p>\n\n\n\n -a\uff1a\u6dfb\u52a0\u78c1\u76d8<\/p>\n\n\n\n -r\uff1a\u79fb\u9664\u78c1\u76d8<\/p>\n\n\n\n -f\uff1a\u6807\u8bb0\u6307\u5b9a\u78c1\u76d8\u4e3a\u635f\u574f<\/p>\n\n\n\n –add, –remove, –fail<\/p>\n\n\n\n mdadm \/dev\/md# –fail \/dev\/sda7<\/p>\n\n\n\n \u76d1\u63a7\u6a21\u5f0f<\/p>\n\n\n\n -F<\/p>\n\n\n\n \u589e\u957f\u6a21\u5f0f<\/p>\n\n\n\n -G<\/p>\n\n\n\n \u88c5\u914d\u6a21\u5f0f<\/p>\n\n\n\n -A<\/p>\n\n\n\n \u67e5\u770bRAID\u9635\u5217\u7684\u8be6\u7ec6\u4fe1\u606f<\/p>\n\n\n\n -D \/dev\/md#<\/p>\n\n\n\n –detail<\/p>\n\n\n\n –scan > \/etc\/mdadm.conf\uff08\u5c06\u5f53\u524dRAID\u4fe1\u606f\u4fdd\u5b58\u81f3\u914d\u7f6e\u6587\u4ef6\uff0c\u4ee5\u4fbf\u4ee5\u540e\u8fdb\u884c\u88c5\u914d\uff1a\uff09<\/p>\n\n\n\n \u505c\u6b62\u9635\u5217\uff1a<\/p>\n\n\n\n -S \/dev\/md#<\/p>\n\n\n\n –stop<\/p>\n\n\n\n \u4f8b\uff1a\u521b\u5efa\u4e00\u4e2a10G\u53ef\u7528\u7a7a\u95f4\u76843\u5757\u76d8<\/p>\n\n\n\n [root@localhost ~]# mdadm -C \/dev\/md0 -a yes -n 3 -l 5 \/dev\/sda1 \/dev\/sda2 \/dev\/sda3<\/p>\n\n\n\n mdadm: Fail to create md0 when using \/sys\/module\/md_mod\/parameters\/new_array, fallback to creation via node<\/p>\n\n\n\n mdadm: Defaulting to version 1.2 metadata<\/p>\n\n\n\n mdadm: array \/dev\/md0 started.<\/p>\n\n\n\n [root@localhost ~]# cat \/proc\/mdstat<\/p>\n\n\n\n Personalities : [raid6] [raid5] [raid4] <\/p>\n\n\n\n md0 : active raid5 sda3[3] sda2[1] sda1[0]<\/p>\n\n\n\n 10475520 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3\/2] [UU_]<\/p>\n\n\n\n [==>………………] recovery = 10.6% (556540\/5237760) finish=0.7min speed=111308K\/sec<\/p>\n\n\n\n unused devices: <none><\/p>\n\n\n\n [root@localhost ~]# mkdir \/test<\/p>\n\n\n\n [root@localhost ~]# mount \/dev\/md0 \/test<\/p>\n\n\n\n [root@localhost ~]# df -h<\/p>\n\n\n\n Filesystem Size Used Avail Use% Mounted on<\/p>\n\n\n\n \/dev\/mapper\/centos-root 50G 2.6G 48G 6% \/<\/p>\n\n\n\n devtmpfs 3.9G 0 3.9G 0% \/dev<\/p>\n\n\n\n tmpfs 3.9G 0 3.9G 0% \/dev\/shm<\/p>\n\n\n\n tmpfs 3.9G 8.7M 3.9G 1% \/run<\/p>\n\n\n\n tmpfs 3.9G 0 3.9G 0% \/sys\/fs\/cgroup<\/p>\n\n\n\n \/dev\/sdb1 1014M 143M 872M 15% \/boot<\/p>\n\n\n\n \/dev\/mapper\/centos-home 42G 33M 42G 1% \/home<\/p>\n\n\n\n tmpfs 781M 0 781M 0% \/run\/user\/0<\/p>\n\n\n\n \/dev\/md0 9.8G 37M 9.2G 1% \/test<\/p>\n\n\n\n [root@localhost ~]# mke2fs -t ext4 \/etc\/md0<\/p>\n\n\n\n mke2fs 1.42.9 (28-Dec-2013)<\/p>\n\n\n\n Could not stat \/etc\/md0 — No such file or directory<\/p>\n\n\n\n The device apparently does not exist; did you specify it correctly?<\/p>\n\n\n\n [root@localhost ~]# mke2fs -t ext4 \/dev\/md0<\/p>\n\n\n\n mke2fs 1.42.9 (28-Dec-2013)<\/p>\n\n\n\n Filesystem label=<\/p>\n\n\n\n OS type: Linux<\/p>\n\n\n\n Block size=4096 (log=2)<\/p>\n\n\n\n Fragment size=4096 (log=2)<\/p>\n\n\n\n Stride=128 blocks, Stripe width=256 blocks<\/p>\n\n\n\n 655360 inodes, 2618880 blocks<\/p>\n\n\n\n 130944 blocks (5.00%) reserved for the super user<\/p>\n\n\n\n First data block=0<\/p>\n\n\n\n Maximum filesystem blocks=2151677952<\/p>\n\n\n\n 80 block groups<\/p>\n\n\n\n 32768 blocks per group, 32768 fragments per group<\/p>\n\n\n\n 8192 inodes per group<\/p>\n\n\n\n Superblock backups stored on blocks: <\/p>\n\n\n\n 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632<\/p>\n\n\n\n Allocating group tables: done <\/p>\n\n\n\n Writing inode tables: done <\/p>\n\n\n\n Creating journal (32768 blocks): done<\/p>\n\n\n\n Writing superblocks and filesystem accounting information: done <\/p>\n\n\n\n [root@localhost ~]# mkdir \/test<\/p>\n\n\n\n [root@localhost ~]# mount \/dev\/md0 \/test<\/p>\n\n\n\n [root@localhost ~]# mount<\/p>\n\n\n\n sysfs on \/sys type sysfs (rw,nosuid,nodev,noexec,relatime,seclabel)<\/p>\n\n\n\n proc on \/proc type proc (rw,nosuid,nodev,noexec,relatime)<\/p>\n\n\n\n devtmpfs on \/dev type devtmpfs (rw,nosuid,seclabel,size=3985976k,nr_inodes=996494,mode=755)<\/p>\n\n\n\n securityfs on \/sys\/kernel\/security type securityfs (rw,nosuid,nodev,noexec,relatime)<\/p>\n\n\n\n tmpfs on \/dev\/shm type tmpfs (rw,nosuid,nodev,seclabel)<\/p>\n\n\n\n devpts on \/dev\/pts type devpts (rw,nosuid,noexec,relatime,seclabel,gid=5,mode=620,ptmxmode=000)<\/p>\n\n\n\n tmpfs on \/run type tmpfs (rw,nosuid,nodev,seclabel,mode=755)<\/p>\n\n\n\n tmpfs on \/sys\/fs\/cgroup type tmpfs (ro,nosuid,nodev,noexec,seclabel,mode=755)<\/p>\n\n\n\n cgroup on \/sys\/fs\/cgroup\/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release_agent=\/usr\/lib\/systemd\/systemd-cgroups-agent,name=systemd)<\/p>\n\n\n\n pstore on \/sys\/fs\/pstore type pstore (rw,nosuid,nodev,noexec,relatime)<\/p>\n\n\n\n cgroup on \/sys\/fs\/cgroup\/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)<\/p>\n\n\n\n cgroup on \/sys\/fs\/cgroup\/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpuacct,cpu)<\/p>\n\n\n\n cgroup on \/sys\/fs\/cgroup\/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)<\/p>\n\n\n\n cgroup on \/sys\/fs\/cgroup\/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)<\/p>\n\n\n\n cgroup on \/sys\/fs\/cgroup\/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids)<\/p>\n\n\n\n cgroup on \/sys\/fs\/cgroup\/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,net_prio,net_cls)<\/p>\n\n\n\n cgroup on \/sys\/fs\/cgroup\/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event)<\/p>\n\n\n\n cgroup on \/sys\/fs\/cgroup\/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)<\/p>\n\n\n\n cgroup on \/sys\/fs\/cgroup\/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb)<\/p>\n\n\n\n cgroup on \/sys\/fs\/cgroup\/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)<\/p>\n\n\n\n configfs on \/sys\/kernel\/config type configfs (rw,relatime)<\/p>\n\n\n\n \/dev\/mapper\/centos-root on \/ type xfs (rw,relatime,seclabel,attr2,inode64,noquota)<\/p>\n\n\n\n selinuxfs on \/sys\/fs\/selinux type selinuxfs (rw,relatime)<\/p>\n\n\n\n systemd-1 on \/proc\/sys\/fs\/binfmt_misc type autofs (rw,relatime,fd=30,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=12878)<\/p>\n\n\n\n debugfs on \/sys\/kernel\/debug type debugfs (rw,relatime)<\/p>\n\n\n\n mqueue on \/dev\/mqueue type mqueue (rw,relatime,seclabel)<\/p>\n\n\n\n hugetlbfs on \/dev\/hugepages type hugetlbfs (rw,relatime,seclabel)<\/p>\n\n\n\n \/dev\/sdb1 on \/boot type xfs (rw,relatime,seclabel,attr2,inode64,noquota)<\/p>\n\n\n\n \/dev\/mapper\/centos-home on \/home type xfs (rw,relatime,seclabel,attr2,inode64,noquota)<\/p>\n\n\n\n tmpfs on \/run\/user\/0 type tmpfs (rw,nosuid,nodev,relatime,seclabel,size=799408k,mode=700)<\/p>\n\n\n\n \/dev\/md0 on \/test type ext4 (rw,relatime,seclabel,stripe=256,data=ordered)<\/p>\n\n\n\n [root@localhost ~]# blkid \/dev\/md0<\/p>\n\n\n\n \/dev\/md0: UUID=”827112e4-bd97-4394-b812-1394dcd10e71″ TYPE=”ext4″ <\/p>\n\n\n\n [root@localhost ~]# mdadm -D \/dev\/md0<\/p>\n\n\n\n \/dev\/md0:<\/p>\n\n\n\n Version : 1.2<\/p>\n\n\n\n Creation Time : Mon Jul 26 04:26:58 2021<\/p>\n\n\n\n Raid Level : raid5<\/p>\n\n\n\n Array Size : 10475520 (9.99 GiB 10.73 GB)<\/p>\n\n\n\n Used Dev Size : 5237760 (5.00 GiB 5.36 GB)<\/p>\n\n\n\n Raid Devices : 3<\/p>\n\n\n\n Total Devices : 3<\/p>\n\n\n\n Persistence : Superblock is persistent<\/p>\n\n\n\n Update Time : Mon Jul 26 04:32:45 2021<\/p>\n\n\n\n State : clean <\/p>\n\n\n\n Active Devices : 3<\/p>\n\n\n\n Working Devices : 3<\/p>\n\n\n\n Failed Devices : 0<\/p>\n\n\n\n Spare Devices : 0<\/p>\n\n\n\n Layout : left-symmetric<\/p>\n\n\n\n Chunk Size : 512K<\/p>\n\n\n\n Consistency Policy : resync<\/p>\n\n\n\n Name : localhost.localdomain:0 (local to host localhost.localdomain)<\/p>\n\n\n\n UUID : 5fb851eb:b930b950:288b80e1:e384eb79<\/p>\n\n\n\n Events : 18<\/p>\n\n\n\n Number Major Minor RaidDevice State<\/p>\n\n\n\n 0 8 1 0 active sync \/dev\/sda1<\/p>\n\n\n\n 1 8 2 1 active sync \/dev\/sda2<\/p>\n\n\n\n 3 8 3 2 active sync \/dev\/sda3<\/p>\n\n\n\n [root@localhost ~]# mdadm \/dev\/md0 -f \/dev\/sda1<\/p>\n\n\n\n mdadm: set \/dev\/sda1 faulty in \/dev\/md0<\/p>\n\n\n\n [root@localhost ~]# mdadm -D \/dev\/md0<\/p>\n\n\n\n \/dev\/md0:<\/p>\n\n\n\n Version : 1.2<\/p>\n\n\n\n Creation Time : Mon Jul 26 04:26:58 2021<\/p>\n\n\n\n Raid Level : raid5<\/p>\n\n\n\n Array Size : 10475520 (9.99 GiB 10.73 GB)<\/p>\n\n\n\n Used Dev Size : 5237760 (5.00 GiB 5.36 GB)<\/p>\n\n\n\n Raid Devices : 3<\/p>\n\n\n\n Total Devices : 3<\/p>\n\n\n\n Persistence : Superblock is persistent<\/p>\n\n\n\n Update Time : Mon Jul 26 04:35:01 2021<\/p>\n\n\n\n State : clean, degraded <\/p>\n\n\n\n Active Devices : 2<\/p>\n\n\n\n Working Devices : 2<\/p>\n\n\n\n Failed Devices : 1<\/p>\n\n\n\n Spare Devices : 0<\/p>\n\n\n\n Layout : left-symmetric<\/p>\n\n\n\n Chunk Size : 512K<\/p>\n\n\n\n Consistency Policy : resync<\/p>\n\n\n\n Name : localhost.localdomain:0 (local to host localhost.localdomain)<\/p>\n\n\n\n UUID : 5fb851eb:b930b950:288b80e1:e384eb79<\/p>\n\n\n\n Events : 20<\/p>\n\n\n\n Number Major Minor RaidDevice State<\/p>\n\n\n\n – 0 0 0 removed<\/p>\n\n\n\n 1 8 2 1 active sync \/dev\/sda2<\/p>\n\n\n\n 3 8 3 2 active sync \/dev\/sda3<\/p>\n\n\n\n 0 8 1 – faulty \/dev\/sda1<\/p>\n\n\n\n [root@localhost ~]# mdadm \/dev\/md0 -f \/dev\/sda2<\/p>\n\n\n\n mdadm: set \/dev\/sda2 faulty in \/dev\/md0<\/p>\n\n\n\n [root@localhost ~]# mdadm -D \/dev\/md0<\/p>\n\n\n\n \/dev\/md0:<\/p>\n\n\n\n Version : 1.2<\/p>\n\n\n\n Creation Time : Mon Jul 26 04:26:58 2021<\/p>\n\n\n\n Raid Level : raid5<\/p>\n\n\n\n Array Size : 10475520 (9.99 GiB 10.73 GB)<\/p>\n\n\n\n Used Dev Size : 5237760 (5.00 GiB 5.36 GB)<\/p>\n\n\n\n Raid Devices : 3<\/p>\n\n\n\n Total Devices : 3<\/p>\n\n\n\n Persistence : Superblock is persistent<\/p>\n\n\n\n Update Time : Mon Jul 26 04:35:40 2021<\/p>\n\n\n\n State : clean, FAILED <\/p>\n\n\n\n Active Devices : 1<\/p>\n\n\n\n Working Devices : 1<\/p>\n\n\n\n Failed Devices : 2<\/p>\n\n\n\n Spare Devices : 0<\/p>\n\n\n\n Layout : left-symmetric<\/p>\n\n\n\n Chunk Size : 512K<\/p>\n\n\n\n Consistency Policy : resync<\/p>\n\n\n\n Name : localhost.localdomain:0 (local to host localhost.localdomain)<\/p>\n\n\n\n UUID : 5fb851eb:b930b950:288b80e1:e384eb79<\/p>\n\n\n\n Events : 22<\/p>\n\n\n\n Number Major Minor RaidDevice State<\/p>\n\n\n\n – 0 0 0 removed<\/p>\n\n\n\n – 0 0 1 removed<\/p>\n\n\n\n 3 8 3 2 active sync \/dev\/sda3<\/p>\n\n\n\n 0 8 1 – faulty \/dev\/sda1<\/p>\n\n\n\n 1 8 2 – faulty \/dev\/sda2<\/p>\n\n\n\n [root@localhost ~]# mdadm \/dev\/md0 -a \/dev\/sda1<\/p>\n\n\n\n mdadm: Cannot open \/dev\/sda1: Device or resource busy<\/p>\n\n\n\n [root@localhost ~]# <\/p>\n\n\n\n [root@localhost ~]# mdadm \/dev\/md0 -a \/dev\/sda2<\/p>\n\n\n\n mdadm: Cannot open \/dev\/sda2: Device or resource busy<\/p>\n\n\n\n [root@localhost ~]# mdadm \/dev\/md0 -r \/dev\/sda2<\/p>\n\n\n\n mdadm: hot removed \/dev\/sda2 from \/dev\/md0<\/p>\n\n\n\n [root@localhost ~]# mdadm \/dev\/md0 -r \/dev\/sda1<\/p>\n\n\n\n mdadm: hot removed \/dev\/sda1 from \/dev\/md0<\/p>\n\n\n\n [root@localhost ~]# mdadm -D \/dev\/md0<\/p>\n\n\n\n \/dev\/md0:<\/p>\n\n\n\n Version : 1.2<\/p>\n\n\n\n Creation Time : Mon Jul 26 04:26:58 2021<\/p>\n\n\n\n Raid Level : raid5<\/p>\n\n\n\n Array Size : 10475520 (9.99 GiB 10.73 GB)<\/p>\n\n\n\n Used Dev Size : 5237760 (5.00 GiB 5.36 GB)<\/p>\n\n\n\n Raid Devices : 3<\/p>\n\n\n\n Total Devices : 1<\/p>\n\n\n\n Persistence : Superblock is persistent<\/p>\n\n\n\n Update Time : Mon Jul 26 04:37:12 2021<\/p>\n\n\n\n State : clean, FAILED <\/p>\n\n\n\n Active Devices : 1<\/p>\n\n\n\n Working Devices : 1<\/p>\n\n\n\n Failed Devices : 0<\/p>\n\n\n\n Spare Devices : 0<\/p>\n\n\n\n Layout : left-symmetric<\/p>\n\n\n\n Chunk Size : 512K<\/p>\n\n\n\n Consistency Policy : resync<\/p>\n\n\n\n Name : localhost.localdomain:0 (local to host localhost.localdomain)<\/p>\n\n\n\n UUID : 5fb851eb:b930b950:288b80e1:e384eb79<\/p>\n\n\n\n Events : 24<\/p>\n\n\n\n Number Major Minor RaidDevice State<\/p>\n\n\n\n – 0 0 0 removed<\/p>\n\n\n\n – 0 0 1 removed<\/p>\n\n\n\n 3 8 3 2 active sync \/dev\/sda3<\/p>\n\n\n\n [root@localhost ~]# mdadm -S \/dev\/md0<\/p>\n\n\n\n mdadm: Cannot get exclusive access to \/dev\/md0:Perhaps a running process, mounted filesystem or active volume group?<\/p>\n\n\n\n [root@localhost ~]# unmount \/dev\/md0<\/p>\n\n\n\n -bash: unmount: command not found<\/p>\n\n\n\n [root@localhost ~]# umount \/dev\/md0<\/p>\n\n\n\n [root@localhost ~]# mdadm -S \/dev\/md0<\/p>\n\n\n\n mdadm: stopped \/dev\/md0<\/p>\n\n\n\n [root@localhost ~]# cat \/proc\/mdstat <\/p>\n\n\n\n Personalities : [raid6] [raid5] [raid4] <\/p>\n\n\n\n unused devices: <none><\/p>\n\n\n\n [root@localhost ~]# <\/p>\n\n\n\n watch: \u5468\u671f\u6027\u5730\u6267\u884c\u6307\u5b9a\u547d\u4ee4\uff0c\u5e76\u4ee5\u5168\u5c4f\u65b9\u5f0f\u663e\u793a\u7ed3\u679c<\/p>\n\n\n\n -n #\uff1a\u6307\u5b9a\u5468\u671f\u957f\u5ea6\uff0c\u5355\u4f4d\u4e3a\u79d2\uff0c\u9ed8\u8ba4\u4e3a2<\/p>\n\n\n\n \u683c\u5f0f\uff1a watch -n # ‘COMMAND’<\/p>\n","protected":false},"excerpt":{"rendered":" 27.1 \u6587\u4ef6\u7cfb\u7edf\u57fa\u672c\u6982\u5ff5 ext2: \u6587\u4ef6\u7cfb\u7edf\u5757\u7ec4\u7ec4\u6210\uff1a \u8d85\u7ea7\u5757\u3001GDT\u3001block bitmap\u3001inod […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-745","post","type-post","status-publish","format-standard","hentry","category-linux"],"aioseo_notices":[],"views":138,"_links":{"self":[{"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=\/wp\/v2\/posts\/745","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=745"}],"version-history":[{"count":1,"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=\/wp\/v2\/posts\/745\/revisions"}],"predecessor-version":[{"id":751,"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=\/wp\/v2\/posts\/745\/revisions\/751"}],"wp:attachment":[{"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=745"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=745"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=745"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"\"](\"http:\/\/www.danios.com\/wp-content\/uploads\/2021\/09\/image-28.png\")
<\/figure>\n\n\n\n