On Wed, Jun 19, 2013 at 12:36 PM, Phil Turmel [off-list ref] wrote:

On 06/19/2013 02:21 AM, Nic Wolfe wrote:

As noted above, you will not be able to use /dev/sdc with the raid card.
 You could try leaving it out and taking a backup with the degraded
array.  That is what I would recommend first.

midgetspy@MidgetNAS:~$ sudo mdadm --assemble /dev/md1 /dev/sdd
/dev/sdb /dev/sde /dev/sdf /dev/sdg
mdadm: Failed to restore critical section for reshape, sorry.

Some googling indicated that my mdadm version (2.6.3) has a known
issue with reshapes so I got the 3.2.6 source and built it and tried
again:

midgetspy@MidgetNAS:~/mdadm-3.2.6$ sudo ./mdadm --assemble /dev/md1
/dev/sdd /dev/sdb /dev/sde /dev/sdf /dev/sdg
mdadm: /dev/md1 assembled from 1 drive - not enough to start the array.
midgetspy@MidgetNAS:~/mdadm-3.2.6$ cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5]
[raid4] [raid10]
md1 : inactive sdg[5](S) sdf[4](S) sde[3](S) sdb[2](S) sdd[0](S)
      9767157440 blocks super 0.91

unused devices: <none>

mdadm --examine: http://pastebin.com/FRQDXDLB

I'm not sure where to go from here.

Thanks,

Nic