On 08/31/2010 06:44 AM, fred smith wrote:
there are only two drives in this mirrored array, sda and sdb. if I need to re-add them both (which, if I understand mdadm correctly, is what your suggestion above would do) how does it know which one is the correct one to re-sync the array with?
None of the commands I suggested mentioned sdb, so I'm not sure why you'd get that impression.
Your kernel logged that it was removing sda2 and sda1 from the array because they are not in sync (non-fresh). /proc/mdstat indicates that sdb1 and sdb2 are components of arrays, but sda1 and sda2 are not.
Most importantly, the "mdmonitor" service should have emailed the root user to notify you that your arrays are broken. You should find out why you aren't getting that email.