Re: NCQ-related READ/WRITE frozen ATA errors with Intel C220 and Intel s3610 SSDs

[Tim Small <tim@seoss.co.uk>]

On 09/08/15 05:27, Andy Smith wrote:
> I've just put together a system based on a Supermicro X10SDV-F
> motherboard, which comes with an Intel C220 SATA controller. I've
> got two Intel DC s3610 SSDs plugged into this, and have
> intermittently been seeing the following ATA errors:
> 
> Jul 23 17:14:41 snaps kernel: [68044.504291]          res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
> 

If you'd like to try and collect a few more data points:

Is there any useful info from smartctl -x ?  e.g. reset counters or
other logged errors - either drive internal errors or cabling/link
related "Sata Phy Event Counters" etc.?

Is attempting to ready SMART info status (e.g. through some daemon e.g.
munin hddtemp etc.) actually triggering these errors?  FWIW smartctl -x
seemed to elicit a reset on an Intel S3510 for me about 5 minutes ago.

Do the drives work any more reliably on a good PCIe card (such as an
asmedia ASM1061 controller, or Sil3132 = both < $15 assuming you are
able to add one) or do you see the same errors?

Have you checked the Intel docs for errata on either part?

Disabling NCQ may just be significant, or it may of course just be
slowing down throughput such that the error is less likely to occur -
assuming it's timing-related.


Tim.

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