[linux-lvm] Powerfailure and snapshot consistency

[hansbkk at gmail.com]

On Sat, Mar 26, 2011 at 12:25 PM, Ron Johnson <ron.l.johnson at cox.net> wrote:
> On 03/25/2011 11:52 PM, Stuart D. Gathman wrote:
>>> On 03/25/2011 11:24 PM, Stuart D. Gathman wrote:
>>>> 2) make sure important LVs do not span multiple PVs (except for LVM
>>>> mirroring) - you could be unhappy in the event of a system crash.
> File a bug...  But against what?  LVM?  The FS?  The block layer?

IMO it's fair enough for low-level processes to assume continuity of
power. Having (and regularly testing) an appropriate UPS is a baseline
component of any system where reliability is important.

Perhaps a re-wording: You will more easily be able to recover your
data in the event of a system crash if your LVs don't span multiple
PVs.