Other SATA HDDs and SSDs are similarly affected. This can vary by firmware rev. The prescription seems to be consistent with my experience. -- richard
On Sep 21, 2010, at 8:58 AM, Ray Van Dolson wrote: > Just wanted to post a quick follow-up to this. Original thread is > here[1] -- not quoted for brevity. > > Andrew Gabriel suggested[2] that this could possibly be some workload > triggered issue. We wanted to rule out a driver problem and so we > tested various configurations under Solaris 10U9 and OpenSolaris with > correct 4K block alignment. > > The "Unit Attention" errors under all operating environments for any > X-25E (we haven't tested other brands) when used as ZIL and attached to > one of the LSI port expanders used in Silicon Mechanics hardware. > > As soon as we move the drives to the onboard SATA controller or > directly attach to the LSI controller (bypassing the expander) the > issues go away. > > Perhaps tweaking the firmware on the port expander would have resolved > the issue, but we're not able to test that scenario currently. > > Of note, heavy workload wasn't required to trigger the problem. We ran > bonnie++ hard on the system -- which appeared to tax the ZIL quite a > bit, but got no errors. > > However, as soon as we set up an NFS VMware datastore and loaded a > couple VM's on it the Unit Attention errors began popping up -- even > when they weren't particularly busy. > > In any case, we'll probably stop chasing our tails on this issue and > will begin mounting all drives used for ZIL internally directly > attached to the onboard SATA controllers. > > Thanks, > Ray > > [1] http://mail.opensolaris.org/pipermail/zfs-discuss/2010-August/044362.html > [2] http://mail.opensolaris.org/pipermail/zfs-discuss/2010-August/044364.html > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss -- OpenStorage Summit, October 25-27, Palo Alto, CA http://nexenta-summit2010.eventbrite.com ZFS and performance consulting http://www.RichardElling.com _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
