Hi, I know that is a too broad question, but please be kind ;) The scenario: RHEL 6.2 - snapshot a disk mounted over multipath device mapper Upgrade system to RHEL 6.4 Merge the snapshot to return the system to previous state. System get unstable and rebooting cyclic (not reaching user-level, at least the logs don't show it) Spot a file that got more or less 1200 bytes corrupted (mostly turned to 0). Sadly, I got called to the machine too late to recover the console output of the reboot (it's a blade and no console logs was configured), and could figure out if some hardware failure happened. As I don't have proper logs to further investigate my questions is: - There are any know issues around snapshotting in this conditions (RHEL 6.2 -> RHEL 6.4, multipath)? - There's any chance of this being a software failure (bug?) and do the restore procedure warn me in the logs (/var/log/message?) about any failure during the restore (even if hardware related). My main suspicion for now is a hardware failure somewhere, but I was kindly asked to be sure that this can't be a bug. Any thoughts or pointers (docs, pieces of code, testing reports) would be appreciate, so don't be shy :) Regards, Guilherme Moro PS: Do Red Hat, or somebody else do any kind of continuous integration tests on LVM? _______________________________________________ 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/