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Dynamic disk help and mirroring

danomatic asked
Medium Priority
Last Modified: 2010-04-13
I have a Dell PowerEdge SC430 with two SATA drives (C drive and D drive).  I have installed Windows 2000 Server.  

Both drives have been converted to Dynamic disks but the C drive cannot be extended in order to create a mirror.

I am getting the message:

Extend Volume
The selected volume was originally created on a basic disk and cannot be extended. Only volumes originally created on dynamic disks can be extended.

The SATA D Drive can be extended.

My questions is, even if I have to reinstall Windows, how can I ensure that the C Drive disk be properly formatted so that it will be able to be extended. -- Dan
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Lee W, MVPTechnology and Business Process Advisor
Most Valuable Expert 2013

You cannot EXTEND a C: drive or the physical disk that contains the boot/system partition.  You CAN Mirror it - I've done it dozens of times.

EXTEND = Grow in size, add another disk or part of disk to make the disk appear larger.
MIRROR = Make an exact copy to another disk.

The disk you are trying to mirror to MUST be RAW (Dynamic, but RAW - no partitions defined - or at least, enough RAW space to accomodate the partition you want to mirror on the other disk.


The "Add Mirror" feature is greyed out on the C Drive.

I have had these same two drives mirrored before on this server but since I have reinstalled windows, on this new install, it doesn’t seem to be possible.

I don’t know what I did differently on this install than I did on the previous.


Well, I finally created the mirror but now it seems the two disks are forever “re-syncing” It seems to be holding the rest of the system up.

Is there a way to set a preference to only re-sync when I want it to in Disk Managment?
Technology and Business Process Advisor
Most Valuable Expert 2013
No.  What do you mean forever re-syncing?  How long has it been?  Are you rebooting?  Is the percentage not incresaing?  (I just did this today on an old P3 and had no problems.

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Ok, I just realized that I was doing all the Windows security updates and rebooting fairly often. Good point about re-booting then.  

Since the computer has now been on for the longest span yet, it seems to have now finished.  -- thanks
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