What kind of ide controller have you got in the 600 and what ide software (scsi emulation modes etc ) and i dont think 2.1 supports 4Gb-> drives ..try wb 3.1 witch will need 3.1 rom (this dont count for 1200 witch can run 3.1 from 3.0 roms) if you dont have 3.1 rom in the 600 i think u have a problem whith large disks..
adonay :-)
