Martin K. Petersen wrote:

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"Alan" == Alan  [off-list ref] writes:

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Not sure you're up-to-date on the T10 data integrity feature.
Essentially it's an extension of the 520 byte sectors common in
disk

[...]

Alan> but here's a minor bit of passing bad news - quite a few older
Alan> ATA controllers can't issue DMA transfers that are not a
Alan> multiple of 512 bytes without crapping themselves (eg
Alan> READ_LONG). Guess we may need to add
Alan> ap-> i_do_not_suck or similar 8)

I'm afraid it stops even before you get that far.  There doesn't seem
to be any interest in adopting the Data Integrity Feature (or anything
similar) in the ATA camp.  So for now it's a SCSI-only thing.

I encourage people to lean on their favorite disk manufacturer.  This
would be a great feature to have on SATA too...

Martin,
SCSI to ATA Translation (SAT) is now a standard
(ANSI INCITS 431-2007) [and libata is somewhat
short of compliance].

Work on SAT-2 is now underway and one of the agenda
items is "end to end data protection" and is in the
hands of the t13 ATA8-ACS technical editor. So it
looks like data integrity is on the radar in the SATA
world.

See http://www.t10.org/ftp/t10/document.06/06-497r4.pdf
for more evidence of how SAS and SATA are converging
at the command and feature set level.

Doug Gilbert