well, if its a problem with the controller, you won;t be able to see more then 9.1 gig's, but unlike ata, you can have 7 or more device's on the scsi chain, one of them being the controller. so 7 9.1 gig drives adds up to 63.7. also, the scsi bus is multi-tasked. unlike the ata bus. that about ends my generic scsi knowledge