Get a Sans Towerraid and and eSATA card that comes with it for some models and use your extra SATA drives.
SANS DIGITAL Server RAID Systems
There is a 2 Bay Raid enclosure for 99$ :
SANS DIGITAL MS2UTN+B 2 Bay SATA to eSATA/USB 2.0 RAID 0 / 1 / SAFE33 / 50 Enclosure (Black)
Not good reviews on that one ...
Thanks E. In the SCSI drive era the faster the better. And the drives were much higher quality. That is of course an apples and oranges comparison (so to speak) because the capacities have leaped since then. But this 10,000 RPM IBM SCSI drive (which is mounted in an external case, oh, I never put the lid on) is nearly always running, and has been for years. The internal SCSI drive (a dinky 1.2 GB or something) on the CPU is original to it, and that dates from the mid 1990s.
I sometimes look at them with concern, then pull a big external USB drive out of a box and back everything up. Again. Same external drive. Still has room. ;’)
As I think I said, these huge drives are more for media storage, a lot of people capture video streams, iTunes and other audio files, DVR use, etc. I don’t need that kind of capacity, but of course, I hunger for it, because at heart I’m still a geek. ;’)