He has 4 160GB SATA drives installed. They show up as 2 160GB drives on Windows Server 2003. I gather that you are saying that since I can only see half the installed drives that it is doing mirroring. If I pulled all 4 drives and replaced them with 1 TB drives, should I have 2 1TB mirrored drives? Is there something on Windows server that allows me to look at the controller configuration or is this a plug and play sort of setup? I was thinking that I could clone his disks to another networked machine and switch all the disks, then clone back to the original.
I've been trying to find information on the Dell website about the controller but it doesn't have anything for the description, part number or item number. I have a copy of his packing slip for the numbers. The controller is described as Item Number 341-6883 Add-In SAS 6/iR (SATA/SAS Controller)- RAID0, Supports 2-4 Hot Plug Hard Drives Part Number GP327. I can't find any info on that particular part whatsoever. Googling for SAS 6/iR gets me a pdf from Dell that indicates the SAS 6/iR family supports both RAID0 and RAID1. I guess I've got to go back and see if I can find a utility to check the controller. If he's got the smaller disks mirrored, he HAS to be in RAID1, right?
I've got him backing up daily to a removable drive so his data is safe. Of course we haven't tried to restore from the backups so it's not THAT safe...