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How to Change Drive Letter on Windows 2003

Posted on 2013-01-13
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Last Modified: 2016-10-27
Hi
I took a backup with Acronis of a 2003 server and I convert the image on a vhd drive and I attached it to a Hyper V running under 2012 server.
Everything looks good except on the physical server I use to have C: and E: drive as partitions and now afer I boot on Hyper V as a VM I have C: and D:
My problem is that I have an app runing on that server that has tons of paths coded on that refer to E:\ not D:\
I need to change the drive letter.
Now when I go to Disk Manager all it show is one Drive with the partitions on. There is no Drive letter for each partion except for the CD Rom.
If I right click on the partion I want to change and chose change drive letter I get an error message that say "The operation did not complete. Check the event viewer.
I have the same on both the original and the VM server.
Any Idea how else I can change the Drive letter?
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Question by:infedonetwork
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Expert Comment

by:SolracM
ID: 38773296
have you tried the DISKPART from the command prompt?
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Author Comment

by:infedonetwork
ID: 38773305
Yes but for some reasons under list volume it shows only the cd rom even if I already list and chosed the proper partition
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Accepted Solution

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infedonetwork earned 0 total points
ID: 38773346
Got it.
hkey_local_machine\system\mounteddevices
rename dosdevices\d: to dosdevices\e:
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Expert Comment

by:noxcho
ID: 38773597
Have you fixed it? The missing drive letters is an old known problem I had to resolve and share the solution with Microsoft :)
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Assisted Solution

by:noxcho
noxcho earned 500 total points
ID: 38773612
In case if you still need it:

Start Windows - press Start - run - type regedit and press ok/enter.
Then find the following key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\{4D36E967-E325-11CE-BFC1-08002BE10318}
There you will need to select Edit - New - Multi-String Value.
Rename it to UpperFilters. Then right click on this value and select Modify. Type PartMgr.
Quit and then restart Windows.
Since then the drive letters will be in WDM.
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Author Closing Comment

by:infedonetwork
ID: 38796101
I fix it with based on the description I give but your could also work
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