`<div dir="ltr">I don't have a lot of experience with the 850 Pro, but a lot with the 840 Pro under OmniOS<div><br></div><div>With 4K block size set in sd.conf and slicing them to only use 80% of their capacity a pool of 72 of them has been under near constant heavy read/write workload for over 3 years without a single chksum error. </div><div><br></div><div>-Chip</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jul 26, 2016 at 1:30 PM, Piotr Jasiukajtis <span dir="ltr"><<a href="mailto:estibi@me.com" target="_blank">estibi@me.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I don’t know a root cause, but it’s better to have a workaround than a corrupted pools.<br>
<br>
--<br>
Piotr Jasiukajtis<br>
<div class="HOEnZb"><div class="h5"><br>
> On 26 Jul 2016, at 20:06, Dan McDonald <<a href="mailto:danmcd@omniti.com">danmcd@omniti.com</a>> wrote:<br>
><br>
> I wonder if those sd.conf changes should be upstreamed or not?<br>
><br>
> Dan<br>
><br>
> Sent from my iPhone (typos, autocorrect, and all)<br>
><br>
>> On Jul 26, 2016, at 1:28 PM, Piotr Jasiukajtis <<a href="mailto:estibi@me.com">estibi@me.com</a>> wrote:<br>
>><br>
>> You may want to force the driver to use 4k instead of 512b for those drivers and create a new pool:<br>
>><br>
>> <a href="https://github.com/joyent/smartos-live/commit/dd25937d2f9725def16f5e8dbb16a8bcbc2213d5" rel="noreferrer" target="_blank">https://github.com/joyent/smartos-live/commit/dd25937d2f9725def16f5e8dbb16a8bcbc2213d5</a><br>
>><br>
>> --<br>
>> Piotr Jasiukajtis<br>
>><br>
>>> On 26 Jul 2016, at 02:24, Shaun McGuane <<a href="mailto:shaun@rackcentral.com">shaun@rackcentral.com</a>> wrote:<br>
>>><br>
>>> Hi List,<br>
>>><br>
>>> I want to report very strange SSD behaviour on a new pool I setup.<br>
>>><br>
>>> The hardware is a HP DL180 G6 Server with the LSI 9207-8i Card<br>
>>> And 8x 1TB Samsung SSD Pro drives. Running omnios-10b9c79<br>
>>><br>
>>> All the drives are brand spanking new setup in a raidz2 array.<br>
>>><br>
>>> Within 2 months the below has happened and there has been very<br>
>>> Little use on this array.<br>
>>><br>
>>> pool: SSD-TANK<br>
>>> state: DEGRADED<br>
>>> status: One or more devices are faulted in response to persistent errors.<br>
>>> Sufficient replicas exist for the pool to continue functioning in a<br>
>>> degraded state.<br>
>>> action: Replace the faulted device, or use 'zpool clear' to mark the device<br>
>>> repaired.<br>
>>> scan: scrub repaired 23K in 1h12m with 0 errors on Mon Jul 25 20:13:04 2016<br>
>>> config:<br>
>>><br>
>>> NAME STATE READ WRITE CKSUM<br>
>>> SSD-TANK DEGRADED 1 67 35<br>
>>> raidz2-0 DEGRADED 4 72 113<br>
>>> c5t500253884014D0D3d0 ONLINE 0 0 2<br>
>>> c5t50025388401F767Ad0 DEGRADED 0 0 19 too many errors<br>
>>> c5t50025388401F767Bd0 FAULTED 0 0 0 too many errors<br>
>>> c5t50025388401F767Dd0 ONLINE 0 0 0<br>
>>> c5t50025388401F767Fd0 ONLINE 0 0 1<br>
>>> c5t50025388401F7679d0 ONLINE 0 0 2<br>
>>> c5t50025388401F7680d0 REMOVED 0 0 0<br>
>>> c5t50025388401F7682d0 ONLINE 0 0 1<br>
>>><br>
>>> Can anyone suggest why I would have this problem where I am seeing CKSUM errors<br>
>>> On most disks and while only one has faulted others have been degraded or removed.<br>
>>><br>
>>> Thanks<br>
>>> Shaun<br>
>>> _______________________________________________<br>
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>><br>
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</div></div></blockquote></div><br></div>
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