On 4/22/2013 7:02 AM, Tommy Apel wrote: > Yes it can be run as it is, it will write to the file given by --filename= > > well from what I make of it so far I wouldn't rule out the bad device > part but at the same time there could be other things involved > although I don't belive it to be the md part > > Stan> do you know anything about the state of ext4 on centos 6.x ? Enough to assume it's not part of the problem here. Andrei's hdparm below the filesystem layer throughput is bouncing up/down by ~100MB/s depending on when he runs it. If he's using LVM and has active snapshots that would definitely cause some extra load, but in that case given his 3 RAID1 pairs it should affect both drives equally. And that's not what we're seeing. I hope my last post gets him closer to identifying the problem. The perf top and iotop data doing $bigfile copy should be instructive. -- Stan -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
