linux系统raid1更换故障硬盘处理过程

1、raidl 更换故障硬盘处理过程：1 .服务器两个硬盘/dev/sda 和/dev/sdb 组成 raidl,结构如下/dev/sdal+/dev/sdb1=/dev/md0/dev/sda2+/dev/sdb2=/dev/md1现在通过 cat/proc/mdstat 发现/dev/sdb 不正常，需要更换2 .先在系统移除/dev/sdb,操作时需要先移除/dev/sdb 的每一个分区a.移除/dev/sdb1先标记/dev/sdb1 为 failrootservera#mdadm-manage/dev/md0-fail/dev/sdb1 这时输入 cat/proc/mdstat 应该可以

2、看到以下信息Personalities:linearmultipathraid0raid1raid5raid4raid6raid10md0:activeraid1sda10sdb12(F)24418688blocks2/1Umd1:activeraid1sda20sdb2124418688blocks2/2UUunuseddevices:移除/dev/sdb1rootservera-#mdadm-manage/dev/md0-remove/dev/sdb1 这时系统返回的结果应该是mdadm:hotremoved/dev/sdb1这时输入 cat/proc/mdstat 应该可以看到以下信息P

3、ersonalities:linearmultipathraid0raid1raid5raid4raid6raid10md0:activeraid1sda1024418688?blocks2/1U_md1:activeraid1sda20sdb2124418688?blocks2/2UUunuseddevices:b.用相同方法移除/dev/sdb2rootservera-#mdadm-manage/dev/md1-fail/dev/sdb2rootservera-#cat/proc/mdstatPersonalities:linearmultipathraid0raidlraid5raid4

4、raid6raid10md0:activeraid1sda1024418688blocks2/1Umd1:activeraid1sda20sdb22(F)24418688blocks2/1Uunuseddevices:rootservera#mdadm-manage/dev/md1-remove/dev/sdb2mdadm:hotremoved/dev/sdb2rootservera#cat/proc/mdstatPersonalities:linearmultipathraid0raid1raid5raid4raid6raid10md0:activeraid1sda1024418688blo

5、cks2/1Umd1:activeraid1sda2024418688blocks2/1Uunuseddevices:这时可以看到只有/dev/sda 在工作.3 .关机rootservera#shutdown-hnow4 .将硬盘/dev/sdb 更换为新的硬盘，开机5 .系统启动完成以后，给新硬盘/dev/sdb 做与/dev/sda 相同的分区，可以用下面的命令完成rootservera#sfdisk-d/dev/sda|sfdisk/dev/sdb 上面的命令表示从/dev/sda 复制分区表至/dev/sdb。然后可以输入 fdisk-l 查看两个硬盘分区是否相同6 .然后把/dev

6、/sdb 的分区挂到 raid1 里面rootservera#mdadm-manage/dev/md0-add/dev/sdb1系统应该返回mdadm:re-added/dev/sdb1rootservera#mdadm-manage/dev/mdl-add/dev/sdb2系统应该返回mdadm:re-added/dev/sdb2然后使用 cat/proc/mdstat 查看结果Personalities:linearmultipathraid。 raid1raid5raid4raid6raid10md0:activeraidlsda10sdb1124418688blocks2/1U=rec

7、overy=9.9%(2423168/24418688)finish=2.8minspeed=127535K/secmd1:activeraid1sda20sdb2124418688blocks2/1U=recovery=6.4%(1572096/24418688)finish=1.9minspeed=196512K/secunuseddevices:Whenthesynchronizationisfinished,theoutputwilllooklikethis:server1:#cat/proc/mdstatPersonalities:linearmultipathraid0raid1raid5raid4raid6raid10md0:activeraid1sda1