<div dir="ltr"><div>Hi Brian, a side note: are you sure that your Samsung 851 drive (I think you're referring more specifically to the Samsung PM851 SSD Drive) supports the NVMe interface standard? I think it doesn't...at least looking at its released interface's specifications: it uses SATA 3 (6.0 Gbps) interface instead of the NVMe 1.1 used by "disks" like the Samsung PM/SM951, PM1725, XS/SM1715 or the PM/SM953...just to name some. </div>Regards, Davide. </div><div class="gmail_extra"> <div class="gmail_quote">On Wed, Dec 9, 2015 at 2:14 PM, Brian Hechinger <<a href="mailto:wonko@4amlunch.net" target="_blank">wonko@4amlunch.net</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">So I decided to do some testing on the pool I have that is made up of a pair of Samsung 851 NVMe drives. I’ve got it partitioned as I’m using part of it to test as SLOG against the “spinning rust pool”. Yes I know these aren’t ideal for this, but they will do for now. I setup the other slices as a mirror and ran iozone against it. It wrote fast. Really fast. Then it stopped. Now the pool seems to be wedged. At first I thought it might be the drives themselves, but I see them still functioning as SLOG just fine, so it’s not that I don’t believe. root@basket1:/root# zpool status -v zoom pool: zoom state: ONLINE status: One or more devices are faulted in response to IO failures. action: Make sure the affected devices are connected, then run 'zpool clear'. see: <a href="http://illumos.org/msg/ZFS-8000-HC" rel="noreferrer" target="_blank">http://illumos.org/msg/ZFS-8000-HC</a> scan: none requested config: NAME STATE READ WRITE CKSUM zoom ONLINE 0 0 1 mirror-0 ONLINE 0 0 6 c4t1d0s1 ONLINE 0 0 6 c5t1d0s1 ONLINE 0 0 6 errors: List of errors unavailable (insufficient privileges) root@basket1:/root# ls /zoom/ iozone.DUMMY.0 iozone.DUMMY.10 iozone.DUMMY.12 iozone.DUMMY.14 iozone.DUMMY.2 iozone.DUMMY.4 iozone.DUMMY.6 iozone.DUMMY.8 iozone.DUMMY.1 iozone.DUMMY.11 iozone.DUMMY.13 iozone.DUMMY.15 iozone.DUMMY.3 iozone.DUMMY.5 iozone.DUMMY.7 iozone.DUMMY.9 root@basket1:/root# touch /zoom/hi So read access appears to be ok. Writes are totally boned, however. That touch just hangs forever. So what do I need to do to provide you all with the information you need to diagnose this. Thanks! -brian _______________________________________________ OmniOS-discuss mailing list <a href="mailto:OmniOS-discuss@lists.omniti.com">OmniOS-discuss@lists.omniti.com</a> <a href="http://lists.omniti.com/mailman/listinfo/omnios-discuss" rel="noreferrer" target="_blank">http://lists.omniti.com/mailman/listinfo/omnios-discuss</a> </blockquote></div> </div>