[linux-lvm] Powerfailure and snapshot consistency

[Phillip Susi]

On 3/27/2011 5:55 PM, Stuart D. Gathman wrote:
> Don't need help, just trying to understand the event.  So from what you
> said, the problem probably stems from the RAID1 resync, which could
> make one PV "older" than the other.

The data is written to the primary mirror first, so this can't happen.
Proper use of barriers will prevent this whole scenario, so my guess is
that you are using ext3 ( which defaults to nobarrier ) or explicitly
mounting ext4 with nobarrier.