[OmniOS-discuss] Hung ZFS Pool

[Brian Hechinger]

Sorry, typo-ed that.

These are SM951

-brian

> On Dec 9, 2015, at 9:02 AM, Davide Poletto <davide.poletto at gmail.com> wrote:
> 
> 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.
> 
> Regards, Davide.
> 
> On Wed, Dec 9, 2015 at 2:14 PM, Brian Hechinger <wonko at 4amlunch.net <mailto:wonko at 4amlunch.net>> wrote:
> 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 at 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: http://illumos.org/msg/ZFS-8000-HC <http://illumos.org/msg/ZFS-8000-HC>
>   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 at 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 at 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
> OmniOS-discuss at lists.omniti.com <mailto:OmniOS-discuss at lists.omniti.com>
> http://lists.omniti.com/mailman/listinfo/omnios-discuss <http://lists.omniti.com/mailman/listinfo/omnios-discuss>
> 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://omniosce.org/ml-archive/attachments/20151209/ff8a1a80/attachment.html>