I have a server running Windows 2003 with two sets of raid 1 disks. One set has the OS on it and seems fine. The second has lots of data and programs on it, including websites. I recently noticed that one of the drives in the second mirror had been displaying bad clusters. I replaced it with another new one. But now, when I try to add mirror to the good drive, it fails with a message in event log describing bad clusters. I run the chkdsk e: /f and it runs and fixes a different problem each time. So I try adding a volume and again it fails. Is there anything to do about this, or should I just back up the older drive and recreate the raid completely from the backup?