Is this the intended display or is it intended to be the physical sector
number?
Mar 10 04:00:54 kernel: scsidisk I/O error: dev 08:02, sector 347470
It's intended to be partition-relative, since the device that is reported is
not the underlying disk drive. In this example, 08:02 == /dev/sda2, so it
makes sense for it to be a relative sector. Partition-relative makes the most
sense from the standpoint of someone who has to figure out which file system
has been damaged by the error.
Leonard