I have been trying to run:
mdadm --grow /dev/md0 --raid-devices=6 --backup-file /backup_raid_grow
I get:
mdadm: Need to backup 1280K of critical section..
mdadm: /dev/md0: Cannot get array details from sysfs
Software versions:
mdadm version 2.5.3, kernel 2.6.17.13
Note that /dev/md0 does in fact have 6 drives, with 4+2 spares:
linux-nas:~/source/mdadm-2.5.3 # mdadm -D /dev/md0
/dev/md0:
Version : 00.90.03
Creation Time : Mon Dec 31 20:20:05 2001
Raid Level : raid5
Array Size : 937681536 (894.24 GiB 960.19 GB)
Device Size : 312560512 (298.08 GiB 320.06 GB)
Raid Devices : 4
Total Devices : 6
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Thu Oct 5 00:24:18 2006
State : clean
Active Devices : 4
Working Devices : 6
Failed Devices : 0
Spare Devices : 2
Layout : left-symmetric
Chunk Size : 128K
UUID : 0d4e2bae:95de9dc6:4bf9f695:9e1a48be
Events : 0.988859
Number Major Minor RaidDevice State
0 8 209 0 active sync /dev/sdn1
1 8 145 1 active sync /dev/sdj1
2 8 129 2 active sync /dev/sdi1
3 8 161 3 active sync /dev/sdk1
4 8 192 - spare /dev/sdm
5 8 176 - spare /dev/sdl
As I said, I am getting an error resizing the array.
Would it need to be unmounted to work properly (It is currently mounted
under lvm)?
Thank you in advance,
mickg
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