Adaptec 5805 Unified Raid Controller, 6 x 1TB Samsung HE103UJ, RAID5
root@giant:~# hdparm -tT /dev/sda
/dev/sda:
Timing cached reads: 17742 MB in 1.99 seconds = 8896.83 MB/sec
Timing buffered disk reads: 1490 MB in 3.00 seconds = 496.62 MB/sec