Hello, we have a 3 user Unity v4.1.6 on a sr2200 3gb ram, vixel 2gb/s 16p switch, and old avid 2TB JBOD. We need to add 3 more clients. Regarding disks we have approached both firenetix and xyratex for quotes on their 2gb/s jbods. They are both quoting 750GB seagate/hitachi drives. They are also both asking the same question:- what cache do we want