They won't introduce a 12KRPM drive (4500, 5400, 7200, 10000, and 15000 are the common standards), they'd just go for 15k, but they won't do that either. Western Digital, you notice, has no SCSI market, or experience making SCSI drives. I wonder pray-tell, what happens when 15K SAS drives hit the market that are intelligent to be run as full-duplex SAS or half-duplex SATA. And 16MB cache is really no better than 8MB. unless you are using them in RAID with write caching enabling, which anyone who says anything about RAID better have experienced for themselve (or they should STFU).