Yes.
Here is some additonal info: in libata-scsi.c
tf->protocol = ATA_PROT_DMA;
2983 tf->hob_feature = 0;
2984 tf->feature = ATA_DSM_TRIM; //0x01
2985 tf->hob_nsect = (size / 512) >> 8;
2986 tf->nsect = size / 512;
2987 tf->command = ATA_CMD_DSM; //0x06
2988 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
2989 ATA_TFLAG_WRITE;
2990
________________________________________
From: Simon Kitching [simon.kitching@xxxxxxxxxx]
Sent: Thursday, April 15, 2010 3:18 PM
To: Bill Weiler
Cc: kernelnewbie
Subject: Re: Researching ATA TRIM command
On Thu, 2010-04-15 at 14:25 -0700, Bill Weiler wrote:
> All,
> I found the task file call in libata-scsi.c in kernel 2.6.33.
>
> TRIM seem to be a SCSI to ATA translation of "WRITE SAME 16".
>
> Under what conditions would "WRITE SAME 16" be called?
>
> (I am not as familiar with SCSI as I am with ATA).
Is this the TRIM operation you are asking about?
http://en.wikipedia.org/wiki/TRIM
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