Solved

Drive letter not available for mapping

Posted on 2014-07-24
6
3,005 Views
Last Modified: 2014-09-29
We have a few computers who lost one of our mapped drives. I went to manually map them to make sure it worked when I noticed from the drive letter drop down menu that the letter was unavailable.

I've looked around and it looks like a usb or other device might have reserved the letter in the registry.

Are there any recommended solutions to resolving this? either a program or very specific registry fix to remove the letter from being reserved so our logon script will map the drive properly again?

Thanks!
0
Comment
Question by:PDGPA
6 Comments
 
LVL 10

Expert Comment

by:tmoore1962
ID: 40217493
Open Explorer ./ right click on computer and choose manage.  from there open disk management and check to see what device has the drive letter in question.  Could be another partition created on a hdd or a card reader or other usb reader from a locally attached printer that has grabbed the drive letter.  Locate the drive letter ie Removable (k:0 in the disk list you can right click on it and change drive letter to make the need drive letter avail again.
0
 
LVL 45

Expert Comment

by:Kdo
ID: 40217507
Hi PDGPA,

We've got a number of background tasks that occasionally map a network drive and later release it using the NET utility.  An error in the task sometimes leaves the drive letter in an odd state.  We can sometimes release it with NET, but a reboot of the desktop always clears it.


Good Luck,
Kent
0
 
LVL 93

Accepted Solution

by:
John Hurst earned 500 total points
ID: 40217624
Check to see if Persistence is keeping mapping alive.

Open an Command Prompt and type NET USE .  This will list all drives.

Then NET USE X: /Delete for ALL drives.

Restart the computer and map the drives again. Do they map properly?  If so, you may wish to have a script that deletes a drive before mapping it when the computer is started.
0
Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

 
LVL 92

Expert Comment

by:nobus
ID: 40218639
maybe they use a fixed drive letter :  http://www.uwe-sieber.de/usbdlm_e.html
0
 
LVL 93

Expert Comment

by:John Hurst
ID: 40224543
@PDGPA  - Thank you and I was happy to help.
0
 

Expert Comment

by:Mark Bajkowski
ID: 40350375
This solution omits a scenario when a net drive crashes and rejects NET USE operation. For such case it is necessary to delete "trapped" drive letter via registry:

a. Login to Windows PC as Administrator.
b. Execute command to Open Registry Editor by typing regedit & press Enter.
c. Navigate to the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices
d. Locate the "trapped" letter, right click and select Delete.
e. Reboot PC.
1

Featured Post

Ransomware: The New Cyber Threat & How to Stop It

This infographic explains ransomware, type of malware that blocks access to your files or your systems and holds them hostage until a ransom is paid. It also examines the different types of ransomware and explains what you can do to thwart this sinister online threat.  

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Lot of troubles with windows 10 7 53
server core and windows updates 3 39
Thoughts on PC Doctor 11 47
Windows 10 taskbar - how to display labels with icons 4 29
If you get continual lockouts after changing your Active Directory password, there are several possible reasons.  Two of the most common are using other devices to access your email and stored passwords in the credential manager of windows.
A quick guide on how to use Group Policy to create a custom power plan and set it active on Windows 7.
The viewer will learn how to successfully create a multiboot device using the SARDU utility on Windows 7. Start the SARDU utility: Change the image directory to wherever you store your ISOs, this will prevent you from having 2 copies of an ISO wit…
This is used to tweak the memory usage for your computer, it is used for servers more so than workstations but just be careful editing registry settings as it may cause irreversible results. I hold no responsibility for anything you do to the regist…

772 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question