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对软RAID(mdadm)方式进行各个场景失效测试。
内核版本:
root@omv30:~# uname -a
Linux omv30 4.18.0-0.bpo.1-amd64 #1 SMP Debian 4.18.6-1~bpo9+1 (2018-09-13) x86_64 GNU/Linux
使用omv创建RAID1之后,查询sdb的信息,此时sdb对应的是8ac693c5的UUID,device号为1:
root@omv30:~# mdadm --query /dev/sdb
/dev/sdb: is not an md array
/dev/sdb: device 1 in 2 device undetected raid1 /dev/md0. Use mdadm --examine for more detail.
root@omv30:~# mdadm --examine /dev/sdb
/dev/sdb:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 921a8946:b273e00e:3fa4b99d:040a4437
Name : omv30:raid1 (local to host omv30)
Creation Time : Sun Sep 30 22:31:39 2018
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 2095104 (1023.00 MiB 1072.69 MB)
Array Size : 1047552 (1023.00 MiB 1072.69 MB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
Unused Space : before=1960 sectors, after=0 sectors
State : clean
Device UUID : 64a58fb5:c7e76b1a:29453878:8ac693c5
Update Time : Mon Oct 1 13:20:56 2018
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 2e1fb65b - correct
Events : 21
Device Role : Active device 1
Array State : AA (‘A‘ == active, ‘.‘ == missing, ‘R‘ == replacing)
root@omv30:~# mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sun Sep 30 22:31:39 2018
Raid Level : raid1
Array Size : 1047552 (1023.00 MiB 1072.69 MB)
Used Dev Size : 1047552 (1023.00 MiB 1072.69 MB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Mon Oct 1 19:46:42 2018
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : omv30:raid1 (local to host omv30)
UUID : 921a8946:b273e00e:3fa4b99d:040a4437
Events : 25
Number Major Minor RaidDevice State
0 8 32 0 active sync /dev/sdc
1 8 16 1 active sync /dev/sdb
配置文件信息:
root@omv30:~# cat /etc/mdadm/mdadm.conf
# mdadm.conf
#
# Please refer to mdadm.conf(5) for information about this file.
#
# by default, scan all partitions (/proc/partitions) for MD superblocks.
# alternatively, specify devices to scan, using wildcards if desired.
# Note, if no DEVICE line is present, then "DEVICE partitions" is assumed.
# To avoid the auto-assembly of RAID devices a pattern that CAN‘T match is
# used if no RAID devices are configured.
DEVICE partitions
# auto-create devices with Debian standard permissions
CREATE owner=root group=disk mode=0660 auto=yes
# automatically tag new arrays as belonging to the local system
HOMEHOST <system>
# definitions of existing MD arrays
ARRAY /dev/md0 metadata=1.2 name=omv30:raid1 UUID=921a8946:b273e00e:3fa4b99d:040a4437
在VirtualBox的存储-SATA下,分别选中两块硬盘,在右边的属性将SATA端口调换位置,即可交换盘符。
root@omv30:~# mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sun Sep 30 22:31:39 2018
Raid Level : raid1
Array Size : 1047552 (1023.00 MiB 1072.69 MB)
Used Dev Size : 1047552 (1023.00 MiB 1072.69 MB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Mon Oct 1 19:52:46 2018
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : omv30:raid1 (local to host omv30)
UUID : 921a8946:b273e00e:3fa4b99d:040a4437
Events : 29
Number Major Minor RaidDevice State
0 8 16 0 active sync /dev/sdb
1 8 32 1 active sync /dev/sdc
可以看到盘符已经换了。
root@omv30:~# mdadm --examine /dev/sdb
/dev/sdb:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 921a8946:b273e00e:3fa4b99d:040a4437
Name : omv30:raid1 (local to host omv30)
Creation Time : Sun Sep 30 22:31:39 2018
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 2095104 (1023.00 MiB 1072.69 MB)
Array Size : 1047552 (1023.00 MiB 1072.69 MB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
Unused Space : before=1960 sectors, after=0 sectors
State : clean
Device UUID : 6e545465:3dcf10df:1d5bb938:fe840307
Update Time : Mon Oct 1 19:52:46 2018
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : a47a7d1f - correct
Events : 29
Device Role : Active device 0
Array State : AA (‘A‘ == active, ‘.‘ == missing, ‘R‘ == replacing)
root@omv30:~# cat /proc/mdstat
Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10]
md0 : active (auto-read-only) raid1 sdb[0] sdc[1]
1047552 blocks super 1.2 [2/2] [UU]
unused devices: <none>
root@omv30:~# fdisk -l
...(省略)
Disk /dev/md0: 1023 MiB, 1072693248 bytes, 2095104 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
mount后访问正常。
关机,新增一块硬盘,占用原来sdc的位置,启动:
root@omv30:~# mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sun Sep 30 22:31:39 2018
Raid Level : raid1
Array Size : 1047552 (1023.00 MiB 1072.69 MB)
Used Dev Size : 1047552 (1023.00 MiB 1072.69 MB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Mon Oct 1 19:52:46 2018
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : omv30:raid1 (local to host omv30)
UUID : 921a8946:b273e00e:3fa4b99d:040a4437
Events : 29
Number Major Minor RaidDevice State
0 8 16 0 active sync /dev/sdb
1 8 48 1 active sync /dev/sdd
root@omv30:~# cat /proc/mdstat
Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10]
md0 : active (auto-read-only) raid1 sdb[0] sdd[1]
1047552 blocks super 1.2 [2/2] [UU]
unused devices: <none>
原来的sdc变成了sdc,raid1还完好保存,不受影响。
关机,然后移除一块硬盘,启动:
root@omv30:~# mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Raid Level : raid0
Total Devices : 1
Persistence : Superblock is persistent
State : inactive
Name : omv30:raid1 (local to host omv30)
UUID : 921a8946:b273e00e:3fa4b99d:040a4437
Events : 29
Number Major Minor RaidDevice
- 8 16 - /dev/sdb
root@omv30:~# mdadm --query /dev/sdb
/dev/sdb: is not an md array
/dev/sdb: device 0 in 2 device undetected raid1 /dev/md0. Use mdadm --examine for more detail.
root@omv30:~# mdadm --examine /dev/sdb
/dev/sdb:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 921a8946:b273e00e:3fa4b99d:040a4437
Name : omv30:raid1 (local to host omv30)
Creation Time : Sun Sep 30 22:31:39 2018
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 2095104 (1023.00 MiB 1072.69 MB)
Array Size : 1047552 (1023.00 MiB 1072.69 MB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
Unused Space : before=1960 sectors, after=0 sectors
State : clean
Device UUID : 6e545465:3dcf10df:1d5bb938:fe840307
Update Time : Mon Oct 1 19:52:46 2018
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : a47a7d1f - correct
Events : 29
Device Role : Active device 0
Array State : AA (‘A‘ == active, ‘.‘ == missing, ‘R‘ == replacing)
root@omv30:~# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : inactive sdb[0](S)
1047552 blocks super 1.2
unused devices: <none>
root@omv30:~# fdisk -l
Disk /dev/sda: 8 GiB, 8589934592 bytes, 16777216 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x8c9b0fb9
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 12582911 12580864 6G 83 Linux
/dev/sda2 12584958 16775167 4190210 2G 5 Extended
/dev/sda5 12584960 16775167 4190208 2G 82 Linux swap / Solaris
Disk /dev/sdb: 1 GiB, 1073741824 bytes, 2097152 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
raid1变成了inactive,但raid信息本身是保存在磁盘中,不会丢失。
场景:正常运行的RAID1,突然一块盘失效,进行重建恢复。
方法:可以用模拟fail的方式,也可以用VirtualBox热插拔硬盘的功能。
初始信息如下:
root@omv30:~# mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sun Sep 30 22:31:39 2018
Raid Level : raid1
Array Size : 1047552 (1023.00 MiB 1072.69 MB)
Used Dev Size : 1047552 (1023.00 MiB 1072.69 MB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Mon Oct 1 20:29:44 2018
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : omv30:raid1 (local to host omv30)
UUID : 921a8946:b273e00e:3fa4b99d:040a4437
Events : 31
Number Major Minor RaidDevice State
0 8 16 0 active sync /dev/sdb
1 8 48 1 active sync /dev/sdd
(1)手工fail掉sdd:
root@omv30:~# mdadm /dev/md0 --fail /dev/sdd
mdadm: set /dev/sdd faulty in /dev/md0
root@omv30:~# mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sun Sep 30 22:31:39 2018
Raid Level : raid1
Array Size : 1047552 (1023.00 MiB 1072.69 MB)
Used Dev Size : 1047552 (1023.00 MiB 1072.69 MB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Mon Oct 1 20:29:59 2018
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 1
Spare Devices : 0
Name : omv30:raid1 (local to host omv30)
UUID : 921a8946:b273e00e:3fa4b99d:040a4437
Events : 33
Number Major Minor RaidDevice State
0 8 16 0 active sync /dev/sdb
- 0 0 1 removed
1 8 48 - faulty /dev/sdd
如果未移除,要先移除损坏的硬盘:
root@omv30:~# mdadm /dev/md0 -r /dev/sdd
mdadm: hot remove failed for /dev/sdd: No such device or address
(2)增加新盘:
root@omv30:~# mdadm /dev/md0 --add /dev/sdc (新加的盘是2G的,经实测不影响RAID1重建)
mdadm: added /dev/sdc
root@omv30:~# mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sun Sep 30 22:31:39 2018
Raid Level : raid1
Array Size : 1047552 (1023.00 MiB 1072.69 MB)
Used Dev Size : 1047552 (1023.00 MiB 1072.69 MB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Mon Oct 1 20:36:22 2018
State : clean, degraded, recovering
Active Devices : 1
Working Devices : 2
Failed Devices : 0
Spare Devices : 1
Rebuild Status : 76% complete
Name : omv30:raid1 (local to host omv30)
UUID : 921a8946:b273e00e:3fa4b99d:040a4437
Events : 48
Number Major Minor RaidDevice State
0 8 16 0 active sync /dev/sdb
2 8 32 1 spare rebuilding /dev/sdc
可以看到正在重建。
过一会儿再执行:
root@omv30:~# mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sun Sep 30 22:31:39 2018
Raid Level : raid1
Array Size : 1047552 (1023.00 MiB 1072.69 MB)
Used Dev Size : 1047552 (1023.00 MiB 1072.69 MB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Mon Oct 1 20:36:24 2018
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : omv30:raid1 (local to host omv30)
UUID : 921a8946:b273e00e:3fa4b99d:040a4437
Events : 53
Number Major Minor RaidDevice State
0 8 16 0 active sync /dev/sdb
2 8 32 1 active sync /dev/sdc
root@omv30:~# cat /proc/mdstat
Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10]
md0 : active raid1 sdc[2] sdb[0]
1047552 blocks super 1.2 [2/2] [UU]
unused devices: <none>
已经重建成功。
在VirtualBox的存储中,勾选sdb的热插拔,然后启动。
系统在运行时,到VirtualBox的存储中移除sdb硬盘,然后查看状态:
root@omv30:~# mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sun Sep 30 22:31:39 2018
Raid Level : raid1
Array Size : 1047552 (1023.00 MiB 1072.69 MB)
Used Dev Size : 1047552 (1023.00 MiB 1072.69 MB)
Raid Devices : 2
Total Devices : 1
Persistence : Superblock is persistent
Update Time : Mon Oct 1 21:13:45 2018
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
Name : omv30:raid1 (local to host omv30)
UUID : 921a8946:b273e00e:3fa4b99d:040a4437
Events : 56
Number Major Minor RaidDevice State
- 0 0 0 removed
2 8 32 1 active sync /dev/sdc
查看系统日志,发现有硬盘离线,并且RAID1降级(有日志跟踪是软RAID的一个优势):
root@omv30:/var/log# dmesg | tail -20
[ 340.551533] md: recovery of RAID array md0
[ 345.881625] md: md0: recovery done.
[ 657.932091] EXT4-fs (md0): mounted filesystem with ordered data mode. Opts: (null)
[ 2571.324851] ata2: SATA link down (SStatus 0 SControl 300)
[ 2576.667851] ata2: SATA link down (SStatus 0 SControl 300)
[ 2582.044796] ata2: SATA link down (SStatus 0 SControl 300)
[ 2582.044864] ata2.00: disabled
[ 2582.045573] ata2.00: detaching (SCSI 3:0:0:0)
[ 2582.058467] sd 3:0:0:0: [sdb] Synchronizing SCSI cache
[ 2582.058528] sd 3:0:0:0: [sdb] Synchronize Cache(10) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[ 2582.058536] sd 3:0:0:0: [sdb] Stopping disk
[ 2582.058552] sd 3:0:0:0: [sdb] Start/Stop Unit failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[ 2586.709149] md/raid1:md0: Disk failure on sdb, disabling device.
md/raid1:md0: Operation continuing on 1 devices.
加入新硬盘。新加的硬盘不能比现有的小,可以比现在的大。
root@omv30:~# mdadm /dev/md0 --add /dev/sdc
开始重建:
root@omv30:~# mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sun Sep 30 22:31:39 2018
Raid Level : raid1
Array Size : 1047552 (1023.00 MiB 1072.69 MB)
Used Dev Size : 1047552 (1023.00 MiB 1072.69 MB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Mon Oct 1 21:38:36 2018
State : clean, degraded, recovering
Active Devices : 1
Working Devices : 2
Failed Devices : 0
Spare Devices : 1
Rebuild Status : 56% complete
Name : omv30:raid1 (local to host omv30)
UUID : 921a8946:b273e00e:3fa4b99d:040a4437
Events : 69
Number Major Minor RaidDevice State
3 8 32 0 spare rebuilding /dev/sdc
2 8 16 1 active sync /dev/sdb
root@omv30:~# cat /proc/mdstat
Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10]
md0 : active raid1 sdc[3] sdb[2]
1047552 blocks super 1.2 [2/1] [_U]
[===================>.] recovery = 95.0% (996288/1047552) finish=0.0min speed=249072K/sec
unused devices: <none>
重建完成:
root@omv30:~# mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sun Sep 30 22:31:39 2018
Raid Level : raid1
Array Size : 1047552 (1023.00 MiB 1072.69 MB)
Used Dev Size : 1047552 (1023.00 MiB 1072.69 MB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Mon Oct 1 21:38:39 2018
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : omv30:raid1 (local to host omv30)
UUID : 921a8946:b273e00e:3fa4b99d:040a4437
Events : 78
Number Major Minor RaidDevice State
3 8 32 0 active sync /dev/sdc
2 8 16 1 active sync /dev/sdb
root@omv30:~# cat /proc/mdstat
Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10]
md0 : active raid1 sdc[3] sdb[2]
1047552 blocks super 1.2 [2/2] [UU]
unused devices: <none>
将两块硬盘挂到一个新装的ubuntu中,启动。
root@UB13:/home/op# fdisk -l
...(省略)
Disk /dev/md127:1023 MiB,1072693248 字节,2095104 个扇区
单元:扇区 / 1 * 512 = 512 字节
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节
root@UB13:/home/op# cat /proc/mdstat
Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10]
md127 : active raid1 sdd[1] sdc[0]
1047552 blocks super 1.2 [2/2] [UU]
unused devices: <none>
可以看到,自动识别出来/dev/md127。
root@UB13:/mnt/md# mdadm -D /dev/md127
/dev/md127:
Version : 1.2
Creation Time : Sun Sep 30 22:31:39 2018
Raid Level : raid1
Array Size : 1047552 (1023.00 MiB 1072.69 MB)
Used Dev Size : 1047552 (1023.00 MiB 1072.69 MB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Mon Oct 1 19:31:08 2018
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Consistency Policy : resync
Name : omv30:raid1
UUID : 921a8946:b273e00e:3fa4b99d:040a4437
Events : 25
Number Major Minor RaidDevice State
0 8 32 0 active sync /dev/sdc
1 8 48 1 active sync /dev/sdd
系统自动识别并恢复了RAID1,不用执行mdadm --assemble --scan。
查看/etc/mdadm/mdadm.conf,也是自动加入了md信息。
mount后访问正常。
至于如何将md127修改成md0,详见下一节。
只有一块硬盘可用,需要在新系统上重建RAID1。
root@op:/home/op# fdisk -l
(未发现新的md设备,略去详细输出)
root@op:/home/op# mdadm --examine /dev/sdb
/dev/sdb:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 921a8946:b273e00e:3fa4b99d:040a4437
Name : omv30:raid1
Creation Time : Sun Sep 30 22:31:39 2018
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 4192256 (2047.00 MiB 2146.44 MB)
Array Size : 1047552 (1023.00 MiB 1072.69 MB)
Used Dev Size : 2095104 (1023.00 MiB 1072.69 MB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
Unused Space : before=1960 sectors, after=2097152 sectors
State : clean
Device UUID : 6e2fc709:35a8f6fb:d4c0e242:6905437d
Update Time : Mon Oct 1 21:40:25 2018
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : e65b30a8 - correct
Events : 78
Device Role : Active device 1
Array State : AA (‘A‘ == active, ‘.‘ == missing, ‘R‘ == replacing)
root@op:/home/op# cat /proc/mdstat
Personalities :
unused devices: <none>
说明新挂载的盘RAID1信息犹在,只需要重新识别:
root@op:/home/op# mdadm --assemble --scan
mdadm: /dev/md/raid1 has been started with 1 drive (out of 2).
root@op:/home/op# fdisk -l
...(省略)
Disk /dev/md127:1023 MiB,1072693248 字节,2095104 个扇区
单元:扇区 / 1 * 512 = 512 字节
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节
root@op:/home/op# mdadm -D /dev/md127
/dev/md127:
Version : 1.2
Creation Time : Sun Sep 30 22:31:39 2018
Raid Level : raid1
Array Size : 1047552 (1023.00 MiB 1072.69 MB)
Used Dev Size : 1047552 (1023.00 MiB 1072.69 MB)
Raid Devices : 2
Total Devices : 1
Persistence : Superblock is persistent
Update Time : Mon Oct 1 21:40:25 2018
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 0
Spare Devices : 0
Consistency Policy : resync
Name : omv30:raid1
UUID : 921a8946:b273e00e:3fa4b99d:040a4437
Events : 78
Number Major Minor RaidDevice State
- 0 0 0 removed
2 8 16 1 active sync /dev/sdb
如果这个时间重启系统,会发现fdisk -l中没有md127了。并且mdadm -D发现RAID1处于inactive。
root@op:/home/op# mdadm -D /dev/md127
/dev/md127:
Version : 1.2
Raid Level : raid0
Total Devices : 1
Persistence : Superblock is persistent
State : inactive
Working Devices : 1
Name : omv30:raid1
UUID : 921a8946:b273e00e:3fa4b99d:040a4437
Events : 78
Number Major Minor RaidDevice
- 8 16 - /dev/sdb
这时需要先mdadm -S /dev/md127删除旧的md127,
再重新mdadm --assemble --scan。
再add硬盘,完成重建即可。
root@omv30:~# mdadm /dev/md0 --add /dev/sdc
这时再重启也不会有影响,唯一的变化就是在之前主机是md0,现在变成了md127了。
解决方法:
修改/etc/mdadm/mdadm.conf,
把第二列:/dev/md/raid1
修改成:/dev/md0
再执行:
update-initramfs -u
重启,搞定。
查看状态
mdadm -D /dev/md0
cat /proc/mdstat
mdadm --examine /dev/sdb
删除md
mdadm -S /dev/md0
激活md
mdadm -A /dev/md0
在新OS上重新导入raid
mdadm --assemble --scan
重建
mdadm /dev/md0 --add /dev/sdc
标签:mon gnu home des create extend byte 字节 sector
原文地址:https://www.cnblogs.com/felix-zp/p/9738724.html