You need the send/recv log to check if queued trim is supported, as per the spec. It's not in ACS-3, but in SATA 3.1. Samsung just doesn't implement the log correctly. I know that Micron and WD SSHD is OK, though.

-Marc

On Monday, January 26, 2015, <bugzilla-daemon@bugzilla.kernel.org> wrote:

https://bugzilla.kernel.org/show_bug.cgi?id=72341

Hannes Reinecke <hare@suse.de> changed:

What |Removed |Added
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CC| |hare@suse.de

--- Comment #84 from Hannes Reinecke <hare@suse.de> ---
Send/Receive FPDMA QUEUED is optional, and totally independent on NCQ.
(And only defined in ACS-3).

The only thing you absolutely need for NCQ is the the NCQ error log.
The NCQ Send/Receive log is only required for Send/Receive FPDMA QUEUED.
Which in turn in required for the DSM 'TRIM' to work.

So the error message is actually wrong, as we should never test for the NCQ
Send/Receive logs on implementations prior to ACS-3.

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