I have an 8400 with dual 160G sata drives in a factory raid configuration. Recently one of the drives has been identified as corrupt.

If I just replace the one bad drive, can it be any sata large enough or does it have to match more closely for the raid to work?

Even the smallest new drive would be far larger in size so is this a problem?

If I pop in the new drive will the raid automatically partition and copy from the existing good drive or do I need to manually format/partition it?

The 2nd drive will go bad too, at that point I may want to just use the one drive. Do I do anything special to disable the raid?