Hi Duncan, > The only work around we have found is to limit these drives to ATA > mode 4. Supposedly newer Seagate firmware for these drives will report > only UDMA mode 4 capable, but for earlier drives (like those probably > found in your raq550) try this patch against 2.4.20. Thanks ! This is the solution. I have applied the patch, and the sync was now OK after about 1 hours for the 70 GB. Is this patch already applyed on the 2.4.21-pre kernels ? If not can someone apply it ? One more time, thanks for your help. Olivier -- Olivier Bornet | français : http://puck.ch/f Swiss Ice Hockey Results | english : http://puck.ch/e http://puck.ch/ | deutsch : http://puck.ch/g Olivier.Bornet@puck.ch | italiano : http://puck.ch/i Get my PGP-key at http://puck.ch/pgp or at http://wwwkeys.pgp.net