NAS326: Restore Deleted JBOD Volume

SpamMaster50000

So i guess it's testdisk now... Or do you see something where i made an error?

Mijzelf

SpamMaster50000 said:

So i guess it's testdisk now... Or do you see something where i made an error?

When using --build, you'll have to provide a --data-offset=16, else the raid header space will be used as well.

SpamMaster50000

Hmm, not good

the problem was that my version of mdadm doesn't yet know the data offset option

~ # mdadm --build --assume-clean --level=linear --raid-devices=2 --rounding=64K --data-offset=16 /dev/md2 /dev/sda3 /dev/sdb3
mdadm: unrecognized option '--data-offset=16'
Usage: mdadm --help
  for help

SpamMaster50000

Can i use losetup instead?

Mijzelf

SpamMaster50000 said:

Can i use losetup instead?

Good thinking! Yes, that should be possible.

losetup /dev/loop1 -o 8192 /dev/sda3

losetup /dev/loop2 -o 8192 /dev/sdb3

mdadm --build <arguments> /dev/md2 /dev/loop1 /dev/loop2