After a little digging discovered and ran 'debugfs' and used the 'testb' command to determine that the mirror mismatch blocks are "not in use". So that's good. However I am rather disturbed that LVM mirroring appears to have bugs that allow images to become out-of-sync. Have read that MD is the only way to go with any kind of RAID and now I see that is true. If anyone can explain what happened here in any positive light I'd be interested in hearing about it. For now I see LVM mirroring as a turkey that should be avoided. Additional details: * both LVs with discrepancies are "root" file system LVs where one or the other is selected in differing 'grub' boot configuration lines * both LVs have an associated mirror log * in the past have experienced system lockups due to a mirrored swap volume; reported it to RH Bugzilla and was told there are deadlock scenarios in the kernel and that mirrored swap volumes are not supported. This and today's discovery leads me to the conclusion that LVM mirroring is a seriously bad idea. _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
