using dmraid to recover data from a isw_raid_member from recovered disks images

Dan Williams dan.j.williams at
Wed May 28 15:54:27 UTC 2014

On Wed, May 28, 2014 at 1:40 AM, Jelle de Jong
<jelledejong at> wrote:
> Hello everybody,
> I think this is the right mailinglist for dmraid?
> I made disk images with dd from to harddrives and made a copy for testing.
> losetup /dev/loop0 sdd1Z-copy
> losetup /dev/loop1 sddSN-copy
> blkid /dev/loop*
> /dev/loop0: TYPE="isw_raid_member"
> /dev/loop1: TYPE="isw_raid_member"
> But how do I use dmraid to assamble the array? dmraid -ay doesnt find
> the devices?

The problem is that the assembly process checks that the metadata on
the drive matches the serial number retrieved from the drive.  At
least that is the case with the "isw_raid_member" support in mdadm.
I'm not sure what dmraid does in this scenario.  What does
"IMSM_NO_PLATFORM=1 mdadm -E /dev/loop[01]" say?

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