I had Ubuntu 10.04 running. I created a software raid 0 with 3 drives.
Today I upgraded to Ubuntu 12.04 (actually a fresh install) and now I am facing a huge problem:
I cant reassemble the raid, because appearently all superblocks are gone. I tried
sudo mdadm --assemble /dev/md0 /dev/sdb /dev/sdd /dev/sde
dumpe2fs shows only for one drive (sde) some raid information like stride and stripe information.
mdadm --examine only shows "
no md superblock detected"
Unfortunately, I cannot make 1:1 backups of each drives because, I simply don't have any drives to spare. So I can not really play around and hope that it works.
Is it still possible to reassemble the array without dataloss? Thx.