On Mon, Aug 16, 2010 at 12:41 PM, Jeff Garzik <jgarzik@xxxxxxxxx> wrote: ... > The main question is whether the size of a DRQ block changes, when LBA > logical size changes? Don't we already know that depends on the ATA command? > I need to review the ATA8 specs in this area, but I > would think some interfaces that return 512-byte pages for things like SMART > info would be unchanged. How do the drives behave for PIO-Data-{In,Out} > commands that are not reading/writing user data, but rather drive metadata? SMART Info/Logs are meta data and as you noted unchanged. Two other meta-data PIO commands I can think of: o FW update: I'm not going to risk bricking this drive to find that out. o Vendor specific selftest/diagnostic commands (I don't know if any exist - just a guess) If someone from Hitachi cares to respond publicly regarding the behavior of this "Engineering Sample", that would be appreciated and helpful. But feedback from any other vendor would be welcome/useful also. I suspect legacy tools might be needed to update firmware and those might continue to function if DRQ block size is still 512 byte. I'd like to leave this hardcoded to ATA_SECT_SIZE until someone can demonstrate a need to change it. Ok? thanks, grant -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html