Drive: SAS Cache: 1GB Read/Write. ECC protection with backup to Flash memory (indefinite backup) 2.5" Drive Bays: 24 OS Supported: Microsoft Windows Server 2008 IA32, x64, IA64(Standard, Enterprise, Datacenter) Microsoft Windows 2003 R2 Microsoft Windows 2003 X64, IA64 Red Hat Linux (32/64) SUSE Linux (32/64) HP-UX VMware 3.5, 4.0 Combo Controller iSCSI ports support Windows, VMware, and Red Hat Linux Temperature: 5 to 40°C Humidity: 10% to 90% RH @ 104°F (40°C) non-condensing Features: Storage Controller : 2 x P2000 G3 Fibre Channel MSA Controller