After seeing a closed thread on this topic, I decided to experiment. Found the answer in reasonably simple steps
(Using Win XP Pro)
1. In My Computer -> Manage -> Disk Manager Print Screen or otherwise record the picture.
2. Start system, enter BIOS Setup. Restore Defaults, Exit w/ save
(this disassociates the RAID array into single drives - you'll be able to redefine them in BIOS later.)
3. In Windows, go to My Computer -> Manage -> Disk Management
(You'll get a dialog to initializa a disk. Cancel that)
4. The disk Manager will show an unallocated disk. Print again this pictoure to compare w/ the previous one.
5. Use Western Digital Diagnostics tool to discover the Ser Nos of all drives. Note these. The drives are listed in the same order as in Windows Disk Manager, so you should now know the disk to replace. (Other HD manufacturers - e.g. Seagate - also have tools to help. I simply use WD Diagnostics)
Now you should be able to locate the bad disk and replace it, followed by redesignating a new RAID array in BIOS and rebuilding in RAID BIOS
(Using Win XP Pro)
1. In My Computer -> Manage -> Disk Manager Print Screen or otherwise record the picture.
2. Start system, enter BIOS Setup. Restore Defaults, Exit w/ save
(this disassociates the RAID array into single drives - you'll be able to redefine them in BIOS later.)
3. In Windows, go to My Computer -> Manage -> Disk Management
(You'll get a dialog to initializa a disk. Cancel that)
4. The disk Manager will show an unallocated disk. Print again this pictoure to compare w/ the previous one.
5. Use Western Digital Diagnostics tool to discover the Ser Nos of all drives. Note these. The drives are listed in the same order as in Windows Disk Manager, so you should now know the disk to replace. (Other HD manufacturers - e.g. Seagate - also have tools to help. I simply use WD Diagnostics)
Now you should be able to locate the bad disk and replace it, followed by redesignating a new RAID array in BIOS and rebuilding in RAID BIOS