The error is being flagged from libata-sff.c, which is part of the hard drive controller. Depending on which kernel you have, it is either SATA only or both SATA and PATA. But, just to be sure, put your ADSL controller back in to see if that affects the error. You might list which kernel version and which Debian you're running in case that is helpful to someone.
Last edited by Quakeboy02; 02-10-2010 at 10:14 PM.