[Kaitain]

Looks about par for the course, actually. Remember that there are two "disk read speed" benchmarks - one is the read from the disk's cache, the other is reading from the disk itself.

Below are successive benchmarks of my software RAID0 array using Seagate drives, each test was 2 minutes apart, using hdparm in Linux (sorry, no Windows on this machine). Results are variable, but fairly similar to yours.

root@sixtyfour gfitch # hdparm -Tt /dev/md0

/dev/md0:
 Timing buffer-cache reads:   2096 MB in  2.00 seconds = 1047.11 MB/sec
 Timing buffered disk reads:  254 MB in  3.05 seconds =  83.21 MB/sec
root@sixtyfour gfitch # hdparm -Tt /dev/md0

/dev/md0:
 Timing buffer-cache reads:   2272 MB in  2.00 seconds = 1134.47 MB/sec
 Timing buffered disk reads:  180 MB in  3.00 seconds =  59.91 MB/sec
root@sixtyfour gfitch # hdparm -Tt /dev/md0

/dev/md0:
 Timing buffer-cache reads:   2248 MB in  2.00 seconds = 1122.49 MB/sec
 Timing buffered disk reads:  208 MB in  3.02 seconds =  68.95 MB/sec
root@sixtyfour gfitch # hdparm -Tt /dev/md0

/dev/md0:
 Timing buffer-cache reads:   2160 MB in  2.00 seconds = 1078.01 MB/sec
 Timing buffered disk reads:  248 MB in  3.00 seconds =  82.60 MB/sec