Dell PowerVault MD3220 24x 2.5" (DAS) 6Gbps SAS

MD3220: Up to Twenty-four (24) 2.5" Drives
Includes:
Dual PSU
Dual 6 GB SAS Controllers

Support for RAID levels 0, 1, 10, 5, 6
Eight 6 Gb SAS ports (4 per controller)
Four 6Gb SAS for host connectivity, One 6 Gb SAS port for drive expansion, One Gb Ethernet for management, One PS/2 Serial for service

Dell Drives supported
15,000 RPM SAS drives available in 73GB and 146GB
10,000 RPM SAS drives available in 146GB and 300GB
7,200 RPM Near-line SAS drives available in 500GB
Solid State Drive (SSD) available in 149GB (available in 3.5" (9 cm) HDD carriers)