SATA RAID Tower
+ 8x 500GB SATA, 512 MB cache
do 8 SATA disks
up to 16 TB with 2 TB disks
OS independent
backplane technology
hot spare disks
RAID management over integrated web server (Ethernet port)
alternative management over display or serial port
email notification system
3 years warranty
SAS version:

1 or 2 SAS host interfaces
RAID level 0, 1, 0+1, 3, 5, 6, 10, 30, 50, 60, NRAID
faster ASIC 400 technology
256 MB cache