just ordered my 300GB Maxtor, i found out in previous installs (not sure if bug in xbtool or lba48) if you have an .xbe file name for your dash longer than 8 characters in the bios it causes the dash to hang on boot and/or even a boot disc will sometimes hang or "jitter". A good sign is if it takes for ever for your dash to load. I've tried this only with x2 4977 and with both F takes rest and G takes rest on a 250 gig hdd, after i changed the .xbe's to <=8 characters everythign worked fine (very odd) not sure if this may hinder the use of the 300 gig hdd's. you may want to check this, also if anyone can confirm the FULL use of a 300gig hdd is working fine with F takes rest, please let us know.
EDIT: PAUL you may want to see this not sure if it is a problem with the big hdd's but i found this out from maxtor about their big hdd's
MaXLine II Nearline PATA Hard Disk Drive Family:
CAPACITIES:
MODEL ACT CYLs HDS SECT MAX CYLS GB CAPACITY
5A250J0 486,344 16 63 16,383 250GB
5A300J0 588,422 16 63 16,383 300GB
NOTE: NEVER enter more than 16,383 cylinders in the system BIOS. This may potentially cause data loss.