Before trying to assemble again md4, do
- Code: Select all
mdadm --manage --stop /dev/md4
mdadm --manage --stop /dev/md4
root@fvdw-sta-kirkwood:/ # mdadm --assemble /dev/md4 /dev/sd[abcd]2 --force
mdadm: /dev/md4 has been started with 4 drives (out of 5).
root@fvdw-sta-kirkwood:/ # cat /proc/mdstat
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4]
md4 : active raid5 sda2[0] sdd2[3] sdc2[2] sdb2[1]
5852511232 blocks level 5, 64k chunk, algorithm 2 [5/4] [UUUU_]
unused devices: <none>
root@fvdw-sta-kirkwood:/ # mdadm --detail /dev/md4
/dev/md4:
Version : 0.90
Creation Time : Thu Jan 1 00:01:07 1970
Raid Level : raid5
Array Size : 5852511232 (5581.39 GiB 5992.97 GB)
Used Dev Size : 1463127808 (1395.35 GiB 1498.24 GB)
Raid Devices : 5
Total Devices : 4
Preferred Minor : 4
Persistence : Superblock is persistent
Update Time : Fri Nov 25 21:55:36 2016
State : clean, degraded
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 64K
UUID : 8508cd4c:e50c8378:642ee5f7:16a31c22
Events : 0.3598
Number Major Minor RaidDevice State
0 8 34 0 active sync /dev/sda2
1 8 18 1 active sync /dev/sdb2
2 8 2 2 active sync /dev/sdc2
3 8 66 3 active sync /dev/sdd2
4 0 0 4 removed
root@fvdw-sta-kirkwood:/ # mount -o ro /dev/md4 /md4
mount: mounting /dev/md4 on /md4 failed: Input/output error
root@fvdw-sta-kirkwood:/ #
mdadm --assemble /dev/md3 /dev/sd[abcde]5
mkswap /dev/md3
swapon /dev/md3
tftp -l /sbin/xfs_repair -r xfs_repair -g ip-pc
chmod 755 /sbin/chmod 755 xfs_repair
tftp -l glibc-mini-mkfs.xfs-25feb14.tar -r glibc-mini-mkfs.xfs-25feb14.tar -g ip-pc
tar -xvf glibc-mini-mkfs.xfs-25feb14.tar -C /
xfs_repair -n /dev/md4
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