On Jun 2, 2011, at 7:40 AM, Josh Simon wrote: > I was just doing some storage research and came across this > http://www.nexenta.com/corp/images/stories/pdfs/hardware-supported.pdf. In > that document for Nexenta (an opensolaris variant) it states that you should > not use Intel X25-E SSDSA2SH032G1 SSD with a SAS Expander. Can anyone tell me > why?
Erhhhmm... it doesn't work. There is a firmware bug that can cause reset storms, killing performance and, in extreme cases, affecting all other devices on the expander. Please contact your Intel FAE for more information. > This seems to be a very common drive people deploy in ZFS pools. Yes. On Jun 2, 2011, at 11:39 AM, Donald Stahl wrote: >> Yup; reset storms affected us as well (we were using the X-25 series >> for ZIL/L2ARC). Only the ZIL drives were impacted, but it was a large >> impact :) > What did you see with your reset storm? Were there log errors in > /var/adm/messages or did you need to check the controller loogs with > something like lsi util? Resets are normally logged to syslog. You will also see transport errors logged in iostat -e or kstat. For more detail, you will see error reports in FMA: fmdump -e. Note: resets are a reaction to a symptom, not a cause. There are many pathologies that are indirectly exposed by the presence of resets. -- richard _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
