[CentOS] fixing partition alignment ?

Wed Dec 12 22:31:54 UTC 2012
Les Mikesell <lesmikesell at gmail.com>

On Wed, Dec 12, 2012 at 9:36 AM, Laurent Wandrebeck
<l.wandrebeck at gmail.com> 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).
> <insert your favorite search engine> wasn't helpful, unfortunately.
> Drives are ext4, driven by C6 x86_64.

Hmmm, might be a fun test of your fault-tolerance to remove disks one
at a time and add them back empty with the partitions properly
aligned.  Maybe...

   Les Mikesell
     lesmikesell at gmail.com