On Mon, Jul 27, 2009 at 3:01 PM, Robin Hill<robin@xxxxxxxxxxxxxxx> wrote: > On Mon Jul 27, 2009 at 02:19:42PM -0500, Jon Nelson wrote: > >> I have a raid6 which is exposed via LVM (and parts of which are, in >> turn, exposed via NFS) and I'm having some really bad performance >> issues, primarily with large files. I'm not sure where the blame lies. >> When performance is bad "load" on the server is insanely high even >> though it's not doing anything except for the raid6 (it's otherwise >> quiescent) and NFS (to typically just one client). >> > Have you checked dmesg for disk errors? I've had similar slowdowns when > there's a bad block on the drive - it's sitting waiting for the retries > to timeout (or the bus to reset) and the read to fail. Yes. There are no bad blocks that are being reported. I also do a "long" SMART test weekly, and a short one daily. The smart values look great. -- Jon -- 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
