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reset HDD mappings?


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#1
Peter516

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I have several external USB 2.0 HDDs that must be mapped to a particular drive letter for my applications to work properly. They suddenly remapped to new letters when I temporarily connected a card reader and now they will not reset back to their original letters. How do I set them back to their original mappings? I can't find any documentation that covers this topic. Any suggestions?
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#2
Major Payne

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You could try re-mapping, but try this if you want :

To change the drive letter assigned to a disk or CD-ROM drive

Open System properties in Control Panel.
Click the Device Manager tab.
Do one of the following:
To change the drive letter for a disk drive, click the plus sign next to Disk drives, and then double-click the drive.
To change the drive letter for a CD-ROM drive, click the plus sign next to CDROM, and then double-click the drive.
Click the Settings tab.
Under Reserved drive letters, change the drive letter.

Notes :
Another way to open Control Panel is to click Start, point to Settings, and then click Control Panel. If you don't see the item you want, click view all Control Panel options.
If the option to change the drive letter assignment is unavailable, you cannot change the drive letter.

Hope this helps.

Ron
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#3
Peter516

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:tazz:
I've been in the Device Manager and double-clicked the appropriate disk drive which opens the USB 2.0 Storage Device USB Device Properties box that offers 5 tabbed options:

General / Policies / Volumes / Driver / Details

None of these have a settings tab that allows for drive letter modification. I'm using WinXP sp 2 if that makes any difference.

Checking the entry for the C: drive on this computer does not lead to a setting tab either.

Any other suggestions?
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#4
Major Payne

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Try this first :

M$' How to change drive letter assignments in Windows XP

If that doesn't do it, try this if you feel comfortable with the registry. Make a backup copy before doing any editing should you have to try it this way :

To change or swap drive letters on volumes that cannot otherwise be changed using the Disk Management snap-in, use the following steps:

Note: In these steps, drive D refers to the (wrong) drive letter assigned to a volume, and drive C refers to the (new) drive letter you want to change to, or to assign to the volume.

1. Make a full system backup of the computer and system state.

2. Log on as an Administrator.

3. Start Regedt32.exe (or Regedit.exe in Windows XP).

4. Go to the following registry key:

HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices

5. Click MountedDevices.

6. On the Security menu, click Permissions.

7. Check to make sure Administrators have full control. Change this back when you are finished with these steps.

8. Quit Regedt32.exe, and then start Regedit.exe.

9. Go to the following registry key:

HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices

10. Find the drive letter you want to change to (new). Look for "\DosDevices\C:".

11. Right-click \DosDevices\C:, and then click Rename. In Windows 2000 you must use Regedit instead of Regedt32 to rename this registry key.

12. Rename it to an unused drive letter "\DosDevices\Z:". (This will free up drive letter C: to be used later.)

13. Find the drive letter you want changed. Look for "\DosDevices\D:".

14. Right-click \DosDevices\D:, and then click Rename.

15. Rename it to the appropriate (new) drive letter "\DosDevices\C:".

16. Click the value for \DosDevices\Z:, click Rename, and then name it back to "\DosDevices\D:".

17. Quit Regedit, and then start Regedt32 (not required in Windows XP).

18. Change the permissions back to the previous setting for Administrators (this should probably be Read Only).

19. Restart the computer.

Ron
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#5
Peter516

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:tazz:
Ron,

Your reference to http://support.micro...kbid=307844#toc did the trick! I can now assign drive letters at will. The only drive I can not change is an external DVD burner connected via firewire. This I had to remove before I could reassign one of the hard drives to its drive letter. Rebooting the computer verified that the drive letter assignments were succussfully accomplished!!!

Thanks for you help!
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#6
Major Payne

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You're more than welcome. Hope you bookmarked the page. :tazz:

Ron
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