Hi, I have HP DL 180 G6 2U Server loaded with CentOS 5.6. Can someone please suggest any good Hardware Raid Controller Card for the mentioned Hardware and OS. The reason being this server comes with Onboard Sata Controller chipset (HP Smart Array B110i Controller). This server has SATA Harddrive - 4 Nos of 500GB each and the OS doesnot detect it. 00:1f.2 SATA controller: Intel Corporation 82801JI (ICH10 Family) SATA AHCI Controller (prog-if 01 [AHCI 1.0]) Subsystem: Hewlett-Packard Company Device 330b Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Interrupt: pin B routed to IRQ 74 Region 0: I/O ports at d880 [size=8] Region 1: I/O ports at d800 [size=4] Region 2: I/O ports at d480 [size=8] Region 3: I/O ports at d400 [size=4] Region 4: I/O ports at d080 [size=32] Region 5: Memory at faffc000 (32-bit, non-prefetchable) [size=2K] Capabilities: [80] MSI: Enable+ Count=1/16 Maskable- 64bit- Address: fee00000 Data: 404a Capabilities: [70] Power Management version 3 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot+,D3cold-) Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME- Capabilities: [a8] SATA HBA v1.0 BAR4 Offset=00000004 Capabilities: [b0] PCI Advanced Features AFCap: TP+ FLR+ AFCtrl: FLR- AFStatus: TP- Kernel driver in use: ahci Kernel modules: ahci Regards, Kaushal