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Poweredge 860
Hardware Raid 1
2x 80GB SATA
Dual-core 64bit Xeon @ 2.40GHz 4MB Cache

kjohnson@tvilnx01:~$ hdparm -tT /dev/sda

/dev/sda:
 Timing cached reads:   7606 MB in  2.00 seconds = 3806.06 MB/sec
 Timing buffered disk reads:  266 MB in  3.00 seconds =  88.64 MB/sec


Poweredge SC1425
Software Raid 1
2x 250GB SATA
Dual-core 64bit Xeon @ 3.00GHz 2MB Cache

kjohnson@tvilnx02:~$ hdparm -tT /dev/md0

/dev/md0:
 Timing cached reads:   1708 MB in  2.00 seconds = 854.30 MB/sec
 Timing buffered disk reads:  188 MB in  3.02 seconds =  62.21 MB/sec