我遇到了以下问题:
我的 Raid 6 (/dev/md6) 在 3 个磁盘从阵列中掉出后发生故障。其中一个磁盘肯定已经掉出一段时间了(在 SMART 中,6 个磁盘中的 5 个正常运行时间为 1 年,另一个正常运行时间为 8 个月 21 天)
我首先尝试将 3 个丢失的驱动器添加回阵列,但 sdf1 处于“忙”状态。我可以添加另外两个。
它说 sdf1 正忙(或类似的情况)所以我重新启动并再试一次。
现在的输出是:
root@server:~# mdadm --assemble --run --force --update=resync /dev/md6 /dev/sd[abcdef]1
mdadm: ignoring /dev/sdd1 as it reports /dev/sda1 as failed
mdadm: ignoring /dev/sde1 as it reports /dev/sda1 as failed
mdadm: ignoring /dev/sdc1 as it reports /dev/sda1 as failed
mdadm: Marking array /dev/md6 as 'clean'
mdadm: failed to RUN_ARRAY /dev/md6: Input/output error
mdadm: Not enough devices to start the array.
其他线索:
mdadm --examine /dev/sd[a-f]1 | egrep 'Event|/dev/sd'
/dev/sda1:
Events : 523989
/dev/sdb1:
Events : 523989
/dev/sdc1:
Events : 523989
/dev/sdd1:
Events : 523989
/dev/sde1:
Events : 523989
/dev/sdf1:
Events : 0
和
root@server:~# mdadm --examine /dev/sd[abcdef]1
/dev/sda1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : f0f7a964:3a8f5f80:a539aff3:cab7a6a5
Name : fileserver:6 (local to host fileserver)
Creation Time : Mon Mar 16 15:07:55 2015
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 7813774957 (3725.90 GiB 4000.65 GB)
Array Size : 15627548672 (14903.59 GiB 16002.61 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : active
Device UUID : 839401fb:04c596d0:78eca459:78d3d7fc
Internal Bitmap : 8 sectors from superblock
Update Time : Tue Dec 15 12:46:10 2015
Checksum : f1607072 - correct
Events : 523989
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 4
Array State : AAA.AA ('A' == active, '.' == missing)
/dev/sdb1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : f0f7a964:3a8f5f80:a539aff3:cab7a6a5
Name : fileserver:6 (local to host fileserver)
Creation Time : Mon Mar 16 15:07:55 2015
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 7813774957 (3725.90 GiB 4000.65 GB)
Array Size : 15627548672 (14903.59 GiB 16002.61 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : a887f904:144d0e39:b306b3a6:29f0a22b
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Jan 4 19:43:04 2016
Checksum : dfc3e244 - correct
Events : 523989
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 0
Array State : AAA.AA ('A' == active, '.' == missing)
/dev/sdc1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : f0f7a964:3a8f5f80:a539aff3:cab7a6a5
Name : fileserver:6 (local to host fileserver)
Creation Time : Mon Mar 16 15:07:55 2015
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 7813775360 (3725.90 GiB 4000.65 GB)
Array Size : 15627548672 (14903.59 GiB 16002.61 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 258048 sectors
Super Offset : 8 sectors
State : active
Device UUID : 87c811fc:b96d2e28:459ae3a6:917b380e
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Jan 4 20:03:32 2016
Checksum : a8c5591f - correct
Events : 523989
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 5
Array State : .AA..A ('A' == active, '.' == missing)
/dev/sdd1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : f0f7a964:3a8f5f80:a539aff3:cab7a6a5
Name : fileserver:6 (local to host fileserver)
Creation Time : Mon Mar 16 15:07:55 2015
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 7813774957 (3725.90 GiB 4000.65 GB)
Array Size : 15627548672 (14903.59 GiB 16002.61 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : active
Device UUID : 18880035:fc631ea4:ee518ad5:b94d2720
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Jan 4 20:03:32 2016
Checksum : 9e3a0a2d - correct
Events : 523989
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 1
Array State : .AA..A ('A' == active, '.' == missing)
/dev/sde1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : f0f7a964:3a8f5f80:a539aff3:cab7a6a5
Name : fileserver:6 (local to host fileserver)
Creation Time : Mon Mar 16 15:07:55 2015
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 7813774957 (3725.90 GiB 4000.65 GB)
Array Size : 15627548672 (14903.59 GiB 16002.61 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : active
Device UUID : 6da68475:bc853f0f:b05e6cd1:43f28656
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Jan 4 20:03:32 2016
Checksum : 7c20988f - correct
Events : 523989
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 2
Array State : .AA..A ('A' == active, '.' == missing)
/dev/sdf1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : f0f7a964:3a8f5f80:a539aff3:cab7a6a5
Name : fileserver:6 (local to host fileserver)
Creation Time : Mon Mar 16 15:07:55 2015
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 7813774957 (3725.90 GiB 4000.65 GB)
Array Size : 15627548672 (14903.59 GiB 16002.61 GB)
Used Dev Size : 7813774336 (3725.90 GiB 4000.65 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : active
Device UUID : bef4edfe:272fcf21:2f23e64d:b811cb04
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Jan 4 19:43:04 2016
Checksum : 42cc70aa - correct
Events : 0
Layout : left-symmetric
Chunk Size : 512K
Device Role : spare
Array State : AAA.AA ('A' == active, '.' == missing)
总共 6 个 4TB 硬盘。如能提供任何帮助,我们将不胜感激
答案1
假设磁盘上的数据完好无损(即驱动器因瞬时故障而被踢出阵列),您可以重建阵列。由于六个驱动器中有五个具有相同的事件计数,因此您可能不会丢失任何数据。
有两种方法可以实现此目的:
快速、高风险的方法:
mdadm --assemble --force --run /dev/sd[abcde]1
。如果可行,这将为您提供一个以降级模式运行的阵列(缺少一个磁盘),等待您重新添加/dev/sdf
并重建它。缓慢而安全的方法:按照修复程序Linux RAID 维基。完整的分步过程太长,无法在此重现,但关键在于您使用
dmsetup
为 RAID 阵列的每个组件卷创建覆盖,让您可以进行试运行修复尝试以查看哪些有效,而无需实际写入磁盘。同样,您将使用驱动器/dev/sda1
在/dev/sde1
降级模式下重新组装阵列。