Mark Lord wrote:
Tejun Heo wrote:
..
scsi1 : ata_piix
ata2.00: failed to IDENTIFY (I/O error, err_mask=0x1)
..
The err_mask is AC_ERR_DEV indicating that the device raised aborted the
IDENTIFY command. I wonder what's going on.
Can you change "#undef ATA_DEBUG" in include/linux/libata.h to "#define
ATA_DEBUG" and report the resulting dmesg? There will be a LOT of
messages so you probably want to increase printk buffer size and detach
other devices if possible. It would be best if your root device isn't
driven by libata so that you can just insert the module and store the
resulting dmesg.
If the command really was "IDENTIFY", then of course it failed.
This is an ATAPI device, and it wants "PACKET_IDENTIFY".
Maybe libata somehow thinks it's ATA rather than ATAPI?
And this is the second one today where it would be very useful
to see a tf dump. It's time to add one to that code patch, methinks.
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