On 10-08-20 04:58 AM, Christoph Hellwig wrote:
On Thu, Aug 19, 2010 at 05:50:11PM -0400, Mark Lord wrote:
On 10-08-19 02:05 PM, Martin K. Petersen wrote:
I'm only aware of one drive that currently
supports more than 512 bytes of payload and it also caps at 4KB.
SSDs based upon the Indilinx Barefoot controller support
more or less "infinite" payload for TRIM, with no cap.
But it predates idword[105], so just has a zero there.
Is there an easy way to identify them? If so we could add a quirk
for them if it provides enough benefit.
Each brand/model identifies itself differently.
But we could start a whitelist on based on the model name field
from the ATA identify data.
The OCZ VERTEX drives I have here, identify themselves as "OCZ-VERTEX",
and accept very very long payloads (no limit?).
The OCZ VERTEX-LE drives here do have a limit, of 8 sectors,
and identify themselves as "OCZ VERTEX-LE" in that field.
That's what hdparm-9.30 uses to figure out the max TRIM payloads,
in the absence of a value in word 105.
Cheers
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