Re: Partitions not recognized when auto-assembling array in initramfs

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On 27/12/2010 15:18, Laurent Pinchart wrote:
[...]
livecd ~ # mdadm --assemble --scan
mdadm: Container /dev/md/imsm0 has been assembled with 2 drives
mdadm: Started /dev/md/vol0_0 with 2 devices
[...]
livecd ~ # mdadm -E --scan
ARRAY metadata=imsm UUID=480da1d0:8150f280:7dd8425d:bec99c46
ARRAY /dev/md/vol0 container=480da1d0:8150f280:7dd8425d:bec99c46 member=0
UUID=17e28225:34f7c425:eb78aece:05c29a40

livecd ~ # mdadm --assemble --scan
mdadm: Container /dev/md/imsm0 has been assembled with 2 drives
mdadm: Started /dev/md/vol0 with 2 devices
[...]
Still good so far. The /dev/md/vol0_0 device is now called /dev/md/vol0.
[...]
If I remove the /etc/mdadm.conf file from the initramfs image, the volume is
detected as vol0_0 instead of vol0 and the partitions are correctly detected.

I don't understand what's going on there, and how I could fix it. Help would
be greatly appreciated.

I don't quite get it either, but there's something funny going on with the device name. I don't know if you've a choice in the name or what, but do things run any more smoothly if you edit the mdadm.conf to have ARRAY /dev/md/vol0_0 container= etc? If so, and you don't like the _0, you may be able to rename the array with --update=name when assembling it. Disclaimer: I don't know much about imsm so I don't really know about the device names and whether they can be selected or renamed.

Cheers,

John.

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