Mikael Pettersson wrote:
Jeff Garzik writes:
> If its ahci, try using ata_piix. I am beginning to think that ATAPI on
> AHCI is broken.
I use a SATAPI DVD-writer on AHCI (Intel 965) on a semi-regular
basis, and it's never had any issues with recent 2.6.2x kernels.
I tend to doubt that the driver is doing the wrong thing. I suspect it's
more that ATAPI devices on SATA are about as standards-compliant in
general as ATAPI devices on PATA (which is to say not very good) and
some of them break if the controller does something slightly differently
or with different timing, which is quite possible in AHCI mode.
Tejun was looking at some SATA analyzer traces of a few drives that were
apparently failing consistently on AHCI. Tejun, did you get anywhere
with this? Even if the trace doesn't reveal any invalid behavior, if it
includes high-precision timing data it would be interesting to compare
that to the results on a working controller..
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