Martin K. Petersen wrote: >>>>>> "Alan" == Alan <alan@xxxxxxxxxxxxxxxxxxx> writes: > >>> 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 - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
