On Sul, 2006-02-26 at 15:36 -0500, Mark Lord wrote:

It still is unreliable, as being discussed in another thread.

libata wrongly says "medium error" any time it issues a command
that the drive rejects (unsupported, invalid parameters, etc..).

It seems to still get a single case wrong. But it does the report the
ATA state correctly still.

This is biting a few people in 2.6.16-rc*, due to the FUA stuff.

It is driven by a table in 

libata-scsi.c:ata_to_sense_error()

so if you can figure out the wrong entry and tweak the table that would
be great