Red Hat Bugzilla – Bug 20951
bad md magic on device at boot time, but RAID0 mounts OK
Last modified: 2007-04-18 12:29:52 EDT
At boot up several error messages (see attached dmesg) indicate "invalid
raid superblock magic on hdcx". However, later is the process the
bind<hdcx,n> process works although it report "nonpersistent superblock" I
am then able to mount /dev/md0 /backup. While I suspect I have some sort
of configuration error, the fact that it works make me think that:
1. The autodetection of RAID arrays does not expect to find nonpersistent
superblock, since no one in their right mind would be using a RAID0
2. The logic used in the "bind<>" process is more forgiving.
This causes another problem when trying to do an Upgrade install of RH
7.0. Anaconda finds the bad superblock. (see attached anaconda dump).
[I'm new to using bugzilla and have not figured out how to do attachments
to this form, it seems to me that cut-n-paste is not the way. I'll try
commit and see if it leads to an attachment selection option.]
You have to use persistent superblocks to get raid autodetect.
Apologies for the unresponsiveness of the previous raidtools packager...