我在尝试恢复 RAID5 3 磁盘阵列时遇到了问题，其中 2x 磁盘似乎已经过时了。
root@mindstorm4: mdadm -E /dev/sd[bcd]
/dev/sdb:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 6a243319:84b8f9a9:355f027e:58b8a6fb
Name : md_stripey
Creation Time : Sun Feb 23 22:08:02 2014
Raid Level : raid5
Raid Devices : 3
Avail Dev Size : 3907028992 (1863.02 GiB 2000.40 GB)
Array Size : 3907028992 (3726.03 GiB 4000.80 GB)
Data Offset : 16 sectors
Super Offset : 8 sectors
Unused Space : before=0 sectors, after=160 sectors
State : clean
Device UUID : 7299f928:b1105a5c:f89d8600:0f944324
Update Time : Sun Jun 5 09:43:12 2016
Checksum : efcdeccc - correct
Events : 4375
Layout : parity-last
Chunk Size : 512K
Device Role : Active device 0
Array State : AAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdc:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 6a243319:84b8f9a9:355f027e:58b8a6fb
Name : md_stripey
Creation Time : Sun Feb 23 22:08:02 2014
Raid Level : raid5
Raid Devices : 3
Avail Dev Size : 3907028992 (1863.02 GiB 2000.40 GB)
Array Size : 3907028992 (3726.03 GiB 4000.80 GB)
Data Offset : 16 sectors
Super Offset : 8 sectors
Unused Space : before=0 sectors, after=160 sectors
State : clean
Device UUID : f403f8da:b4eec381:fbcf9628:b562ad94
Update Time : Wed Feb 1 00:15:25 2017
Checksum : 60f42d25 - correct
Events : 574913
Layout : parity-last
Chunk Size : 512K
Device Role : Active device 2
Array State : ..A ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdd:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 6a243319:84b8f9a9:355f027e:58b8a6fb
Name : md_stripey
Creation Time : Sun Feb 23 22:08:02 2014
Raid Level : raid5
Raid Devices : 3
Avail Dev Size : 3907028992 (1863.02 GiB 2000.40 GB)
Array Size : 3907028992 (3726.03 GiB 4000.80 GB)
Data Offset : 16 sectors
Super Offset : 8 sectors
Unused Space : before=0 sectors, after=160 sectors
State : active
Device UUID : a69bf0c5:49d75e40:2ad555a4:fe6d68c3
Update Time : Wed Feb 1 00:13:22 2017
Checksum : b504bd62 - correct
Events : 574909
Layout : parity-last
Chunk Size : 512K
Device Role : Active device 1
Array State : .AA ('A' == active, '.' == missing, 'R' == replacing)
当我尝试激活时；
root@mindstorm4: mdadm -A --scan -v
mdadm: looking for devices for further assembly
<snip>
mdadm: no RAID superblock on /dev/sda
mdadm: /dev/sdd is identified as a member of /dev/md/md_stripey_0, slot 1.
mdadm: /dev/sdc is identified as a member of /dev/md/md_stripey_0, slot 2.
mdadm: /dev/sdb is identified as a member of /dev/md/md_stripey_0, slot 0.
mdadm: added /dev/sdb to /dev/md/md_stripey_0 as 0 (possibly out of date)
mdadm: added /dev/sdd to /dev/md/md_stripey_0 as 1 (possibly out of date)
mdadm: added /dev/sdc to /dev/md/md_stripey_0 as 2
mdadm: /dev/md/md_stripey_0 assembled from 1 drive - not enough to start the array.
mdadm: looking for devices for further assembly
mdadm: No arrays found in config file or automatically
但是，设备文件 /dev/md/md_stripey_0 不存在，所以我无法使用--detail 检查阵列状态。
此外，我担心运行，mdadm -A --force ...因为手册页说这具有潜在的破坏性。