Neil/Dave,

Is it not possible to create imsm container with missing disk?
If not, Is there any way to recreate the array with all disks but
prevent any kind of sync which may overwrite array data?

Any other ideas where to go from here?

thanks
chris

On Fri, Jan 11, 2013 at 12:53 PM, chris [off-list ref] wrote:

Ok so I looked through the examine data and it appears the order of
the disks was:

sde 0 - Z1E1AKPH
sdc 1 - Z24091Q5
sdb 2 - Z1E1RPA9
sdd 3 - Z1E19E4K

So I was going to try the first possible combination and assemble with
sde/sdc/sdb/missing, this is what I tried:

# export IMSM_NO_PLATFORM=1
# mdadm --create --verbose /dev/md/imsm /dev/sde /dev/sdc /dev/sdd
missing --raid-devices 4 --metadata=imsm
mdadm: /dev/sde appears to be part of a raid array:
    level=raid0 devices=0 ctime=Thu Jan  1 00:00:00 1970
mdadm: metadata will over-write last partition on /dev/sde.
mdadm: /dev/sdc appears to be part of a raid array:
    level=raid0 devices=0 ctime=Thu Jan  1 00:00:00 1970
mdadm: metadata will over-write last partition on /dev/sdc.
mdadm: /dev/sdd appears to be part of a raid array:
    level=container devices=0 ctime=Thu Jan  1 00:00:00 1970
mdadm: metadata will over-write last partition on /dev/sdd.
mdadm: size set to 1953511431K
Continue creating array? y
mdadm: This level does not support missing devices

The example commands I found for creating imsm array were like this:
mdadm --create --verbose /dev/md/imsm /dev/sde /dev/sdc /dev/sdd
missing --raid-devices 4 --metadata=imsm
mdadm --create --verbose /dev/md/Volume0 /dev/md/imsm --raid-devices 4 --level 5

Should I be defining level=5 when creating /dev/md/imsm also? Or
should I only do it for imsm container and omit it from creating
/dev/md/Volume0?

thanks for everything so far I feel like I'm pretty close, once I can
get the arrays up with missing and dont have to worry about
overwriting anything then I'm sure I can work out the right
combination of disks and hopefully the disks with no imsm metadata
arent so damaged I cant recover

chris

On Thu, Jan 10, 2013 at 8:42 PM, Dan Williams [off-list ref] wrote:

quoted

quoted