On 12/12/2012 09:36 AM, Laurent Wandrebeck wrote:
> I've discovered that most of the hard drives used in our cluster got
> misaligned partitions, thus crippling perfs. Is there any way to fix
> that without having to delete/recreate properly aligned partitions, then
> format it and refill disks ?
> I'd be glad not to have to toy with moving several 10s of TB disk by
> disk :D (most disks are JBOD as we're using a fault tolerant network
> FS, moosefs not to name it).
The data is going to have to be moved. There's just no way around it, and
shifting it a few sectors one way or the other is going to be no faster,
and a lot more dangerous, than copying it to a new partition. Copying to
a different drive should be somewhat faster than copying to the same
drive since neither drive needs to share its controller with both the
read and write streams.
--
Bob Nichols "NOSPAM" is really part of my email address.
Do NOT delete it.