By coincidence I've just setup my first MD RAID0 partitions on a different system. Discovered echo "check" >>/sys/block/md?/md/sync_action which triggers a mirror check. I'm guessing that this operation takes account of the DISCARD discrepencies and therefore does not report false errors. (correct me if I'm wrong) Does LVM have anything similar to this feature? At 04:01 PM 12/2/2011 -0500, Stuart D. Gathman wrote: >This is not necessarily a bug. Both MD and LVM support >DISCARD, and discarded blocks are not necessarily synced >between mirror legs. The same thing happens with MD, >and the MD "cmp" operation reports the number of blocks >out of sync, but not which blocks! (So LVM is actually >an improvement on that score.) Swap volumes make >heavy use of DISCARD and are especially likely to >have blocks out of sync. _______________________________________________ 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/
