Alright, I need the most silent SCSI hard drive that I can possibly get. It'll be the main SCSI drive in my 9600. I don't care how big or how small the drive is, just that it's quiet. The only noise coming from my 9600 at the moment is the power supply fan and I don't want to increase it at all if possible. I have a SATA card with an SSD and a 1TB Seagate that are both basically dead silent. I want the equivalent of that in SCSI.

I'm hearing some good things about those Seagate 15K Cheetah drives. You have the 15k.3, 15k.4, 15k.5 and so on but I don't know the differences between them. The quietest one that'll fit into a 9600 is the one I'll take regardless of size.