Increase the amount of storage in your rack with this RSV-S4-X storage enclosure from Rosewill. The chassis utilizes a special tray in and out design to make drive swaps faster. The enclosure supports RAID levels 0, 1, 5, 5+spare, spanning and JBOD. A full 150W power supply provides ample power even under heavy load. There is also plenty of power to run the chassis exhaust fans and the drive cage fans. The well ventilated chassis helps to keep the drives cool and running at peak levels. Drive: SATA 150 & 300 OS Supported: Windows 2000, XP, Vista, and Windows Server 2003, Win7 Supports MAC and Linux. (Please note that the host adapter card is based on Silicon Image chipset, which currently only support up to MAC OS 10.6.6 by Silicon Image.) Power Supply: 150W (115V - 230V Switchable) Dimensions: 5.3" x 7.1" x 10.0" Weight: 5.9 lbs. Features: Chipset: SiliconImage 3726 and Controller Card: Siliconlmage 3132 HDD Trays: 4 Hot-Swappable 3.5" Maximum Capacity: 8TB (2 TB per Bay) Cooling Fan: 3.15" Ball Bearing Fan Drive Interface: 4 x 3.5" SATA I/ SATA II Accesses four hard drives using only one cable. Package Contents: RSV-S4-X x1 PCIe HDD Controller adapter card x1 Low profile bracket x1 SATA cable x1 Power cable x1 Screw Sets x1 Parts: 1 year limited