The Output of mdadm --query --detail shows that your RAID is currently rebuilding (Rebuild Status : 4% complete). The UUID and the Status of the drives seems to be OK. It's hard to guess what the reason for the crash was.
-- Feisty crash possibly related to mdadm/raid5 https://bugs.launchpad.net/bugs/110304 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs