Matthias Urlichs wrote:
> I have a 7-disk raid6 array. Two of the disks have shut down due to a > flaky power supply. I rebooted the system. The degraded RAID didn't come > up. > > $ mdadm -A /dev/md7 /dev/hd[bceijkl]1 > mdadm: failed to add /dev/hdk1 to /dev/md7: Invalid argument > mdadm: failed to add /dev/hdl1 to /dev/md7: Invalid argument > mdadm: /dev/md7 assembled from 3 drives - not enough to start the array. > > This is wrong. There are *five* working devices in that array, and in > fact all of them showed up in /proc/mdstat (the array was inactive, of > course). > > $ mdadm -A /dev/md7 /dev/hd[bceij]1 > This worked.
Matthias, please provide your /etc/mdadm/mdadm.conf entries for the array in question (/dev/md7). From the description of your problem it seems it is due to incorrect content of the array entry in there -- not all and wrong devides are listed. If I'm right, please try booting with correct mdadm.conf contents.
/mjt
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