I have a Precision T3400 with a Core 2 Duo, 1 GB of RAM and 3 Hard Drives (All SATA). Two hard drives I believe are identical and are 80GB and one is a different brand at 120GB. I'm trying to set up RAID5 and I know it is supported on this computer.
The user manual does have instructions to do so without any special hardware controllers, and when I enter in the BIOS and follow the steps, I see it allows me to do RAID 0, RAID 1 just fine. I can create a volume name, select either 0 or 1 and then select which of the two disks I'd like to either stripe or mirror and I can also set the size.
For RAID 5 though however, I can enter in a name, choose the option for RAID 5, however the menu to select the three disks I want is grayed out (maybe because it knows it needs all three?) but in the instructions it says that I should have the option to "Press the up- and down-arrow keys and spacebar to select the three or four drives you want to use to make up your volume, and then press <Enter>."
It just moves me straight to select a strip size (default it says is 64KB) and the other weird part is that it asks me for a capacity and has a default selected of 149GB, but none of the drives are that large, it should default to the smallest size of 80 GB.
Am I doing something wrong here? There is Red Hat installed on one of the drives, but I imagine that it shouldn't be a problem to be able to select the option for RAID and then have it ask me to re-install the operating system?