Re: [RFC] Discard update for 3.19

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>>>>> "Bernd" == Bernd Schubert <bschubert@xxxxxxx> writes:

Bernd,

Bernd> I have seen data corruption on an Intel SSD 510 after sending
Bernd> WRITE SAME UNMAP. As far as I remember, these disks ignore writes
Bernd> after sending that command. Unmap worked fine, though. So
Bernd> possibly there is another blacklisting required.

Well, the 510 is a SATA drive and doesn't implement either command so
that would be an LSI SATL problem. I recall that we had some problems
with the LSI firmware blacklisting DRAT/RZAT on that particular drive so
I did the same in my libata patch.

I don't have any bugs open with WRITE SAME or UNMAP on recent LSI
firmware, though. We use it extensively here.

-- 
Martin K. Petersen	Oracle Linux Engineering
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