On Sat, 02 Oct 2010 07:05:06 +0900 (JST) Hirokazu Takahashi <taka@xxxxxxxxxxxxx> wrote: > Hi, > > > > > > > I'm not sure the modern SATA disk can detect such failure. > > > > > > > > > > I think the modern SATA disk has this feature while the IDE disk doesn't > > > > > have. > > > > > > > > Do you have any pointer? > > > > > > This may help you: > > > http://www.seagate.com/content/pdf/whitepaper/SerialATA_comparison_UATA_Technology.pdf > > > It says serial ATA adds 32-bit CRC error correction for all bits transmitted, > > > as opposed to only data packets in Ultra ATA. > > > And it is known that each sector of modern disks has extra bits for ECCs to > > > correct errors. > > > > Hmm, this isn't same as what SCSI DIF (and enterprise storage) does to > > prevent silient data corruption. This handles only transmission > > corruption. So there is still a good chance that silient data > > corruption could happen. > > > > SCSI DIF and enterprise storage maintain extra bytes per sector for > > checksumming to prevent silient data corruption. > > I guess SCSI DIF is a feature which adds extra bytes to each sector > and its protocol allows software to control them. Kinda. > I think each sector has another extra field which SCSI or SATA drives > internally use to correct errors. Can you provide a pointer to the info that SATA drives internally keep extra bytes per sector for error correction? That's what I asked you in the previous mail. -- To unsubscribe from this list: send the line "unsubscribe stgt" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
