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.