3TB Barracuda XT Seagate drive performance on a Mac Pro

After testing the first version of the Seagate 3TB with xbench on a 12-core Mac Pro, here are the results.  It should be noted that this is the first version of the 3TB Seagate Barracuda XT and that the widely available versions due out soon(?) will likely have improved performance characteristics.

Four 2TB Seagate Barracudas on RAID Card, RAID 5:
4 x 2TB Seagate Barracudas on RAID

3TB Seagate Barracuda on RAID Card (single disk, not RAID 5):

3TB Seagate Barracuda on RAID Card

3TB Seagate Barracuda Drive not on RAID Card:3TB Seagate Barracuda Drive not on RAID

1TB Western Digitial Black not on RAID:

1TB WDC-WD1001FALS, NON-RAID

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