Hello,
I am running a 7 disk raid 6 array. A disk failed last night during a
regularly scheduled resync. I tried using mdadm --fail and --remove but
mdadm froze.
When I rebooted mdadm reports the device as removed.
I replaced the drive, reformatted and repartitioned.
When I try to add the drive back in, mdadm reports that it is an invalid
argument to re add.
Below is the mdadm --detail and my attempt to remove and add the drive
/dev/sdf1
It would appear that I did not manage to properly fail and remove the
drive. Is there a way of doing this after the fact so that I can add the
new drive?
I would appreciate any input you would have.
Thanks,
- Justin
[root@BigBlue ~]# mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Wed Jan 15 22:46:32 2014
Raid Level : raid6
Used Dev Size : -1
Raid Devices : 7
Total Devices : 6
Persistence : Superblock is persistent
Update Time : Fri Jul 3 09:22:41 2015
State : active, degraded, Not Started
Active Devices : 6
Working Devices : 6
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 128K
Name : BigBlue:0 (local to host BigBlue)
UUID : 0849c677:64e4772e:8892d80b:47e0097a
Events : 15135
Number Major Minor RaidDevice State
0 8 33 0 active sync /dev/sdc1
1 8 49 1 active sync /dev/sdd1
2 8 65 2 active sync /dev/sde1
3 0 0 3 removed
4 8 97 4 active sync /dev/sdg1
7 8 113 5 active sync /dev/sdh1
6 8 17 6 active sync /dev/sdb1
[root@BigBlue ~]# mdadm --manage /dev/md0 --remove /dev/sdf1
mdadm: hot remove failed for /dev/sdf1: No such device or address
[root@BigBlue ~]# mdadm --manage /dev/md0 --add /dev/sdf1
mdadm: add new device failed for /dev/sdf1 as 8: Invalid argument
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