I have a new Poweredge 2950 with 3 SAS 160GB Seagate drives installed in slots 1,2 &3 I also have 3 Seagate 2 TB SATA drives installed in slots 4,5&6 . These drives also have the Dell HP592 PN939 Poweredge 2950 SATAu Interposer cards installed. When I tried to install Windows Server 2008 on machine the software does not see any drives.. In the BIOS setup I cannot see any drives also. In the BIOS utility setup I can see the drives in the Expandable RAID controller PD Management window and the info reported is correct. No RAID has been setup-up and I don't want any . I want to install the OS on the first SAS drive leaving all other drives for data storage. Do I need to install some kind of driver when I try to install Windows Server or do I need to some how set up the installed drives in the BIOS somewhere? The PERC is an LSI 5/i .