Problem with removed mirrored drive

Microsoft Windows server 2003
October 14, 2009 at 07:54:37
Specs: Windows Server 2003, P4, 2GB

I had a Win2003 file server set up with mirrored
drives for the OS. Having a mirrored setup
was nice, but not critical for this system, and
since I've had to add some additional hardware
there were no longer enough SATA and power
cables left. So I removed the mirror via Disk

The system still boots fine, but the remaining
drive seems to be set to "read only",
presumably because it think's it's still part of a
broken mirror. Disk Management shows the
drive functioning as normal, but the options
there are "read only" as well.

Is there a way to reset the drive config so it
forgets the mirror. I know how to do this in
FreeBSD with gmirror, but not in Windows.

Thanks in advance,

Ben Craig

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October 14, 2009 at 08:12:59
Yuc. Be careful with this. I would do a full backup of your drive before doing anything.

Ok, I am guessing your Drive 0 is set to Extended. If so then right-click the left column (this is actually buttons and not just labels) where it says Drive 0 and change it back to a basic partition. The only problem is that I am not sure you can do this without having to repartition an format the drive.

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October 14, 2009 at 08:25:46
When you have a mirrored hard drive, a RAID array has to have been set up for that BEFORE the operating system was installed. Windows then sees the two (or more) drives in the RAID array as one drive.
When you have removed the drive the mirror is on, you're messing up the RAID array.
If you want to undo the RAID array, you're going to have to do something such as install the mirrored drive again, copy your data to another drive, remove the RAID array, copy your data back to the primary drive, then you can use the drive you were using as a mirror for whatever you like.
(There may be some other way.)
For the least amount of work involved, install the mirrored drive again, leave the RAID array as is, install a PCI drive controller card in a slot in order for you to be able to add more SATA (or IDE) drives, and get some power connector Y cables to add more power connectors.

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