PCI-X/64-bit/133MHz, half-length, LOW PROFILE 4-port Serial ATA II hardware RAID card with 3Gb/sec, RAID 0, 1, 10, 5, JBOD, Single Disk Contents: 9550SXU-4LP SATA II RAID card, (4) 1m SATA cables, 1 CD containing drivers, 3DM 2 disk management software and documentation RoHS 6 of 6 Compliant. AMCC Storage 3ware Serial ATA II (3Gbps) hardware RAID controllers: Half length, PCI-X 1.0a compliant 64-bit, 133/100/66MHz bus master Serial ATA Integrated specification 2.5 RoHS 6 of 6 compliant OS Support: Windows 2000/2003/XP, version of Red Hat Linux, version of SuSE Linux, version of FreeBSD. Includes hot swap/hot spare, S.M.A.R.T. monitoring, 3DM 2 disk management software. (For a complete list of operating system compatibility and system support, please visit our web site at www.3ware.com/support/OS-support.asp)