Solved

External Hard Drive loses drive letter

Posted on 2010-09-16
9
695 Views
Last Modified: 2012-05-10
I am using Win 7 and have an external Hard Drive for backup connected through the USB port. I assign a drive letter but when I reboot I have to go back in disk management and reassign the drive letter

Shouldn't it boot up with that drive letter?
0
Comment
Question by:BobMc7771
  • 6
  • 2
9 Comments
 
LVL 6

Expert Comment

by:che6ausc
ID: 33694206
Windows should assign the next available letter to the external drive since it is a removable disk.
0
 
LVL 6

Accepted Solution

by:
che6ausc earned 125 total points
ID: 33694240
0
 

Author Comment

by:BobMc7771
ID: 33694242
I would like that but it did not

When I first attached it I had to go to disk management and assign the drive letter

When I reboot and look at My Computer it does not show

When I go to disk manager I see it but it has no drive letter

I re-assign and it works fine

??
0
 
LVL 6

Expert Comment

by:che6ausc
ID: 33694329
Have you seen my secon d post about USBDLM?
0
Comprehensive Backup Solutions for Microsoft

Acronis protects the complete Microsoft technology stack: Windows Server, Windows PC, laptop and Surface data; Microsoft business applications; Microsoft Hyper-V; Azure VMs; Microsoft Windows Server 2016; Microsoft Exchange 2016 and SQL Server 2016.

 
LVL 6

Expert Comment

by:che6ausc
ID: 33694491
Take a look at this key in the registry to see what letters have been assigned to what devices: HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices
0
 

Author Comment

by:BobMc7771
ID: 33694589
The attached shows the My Computer Hard Drives

The drives M and N (both mapped to same physical drive are the ones that disappear when I reboot

The registry entries are in the word document as well

What are all the ?? entries

I do have a SATA docking slot that I rotate backup drives through

THank you for looking at this
Hard-Drives.doc
0
 
LVL 63

Assisted Solution

by:SysExpert
SysExpert earned 125 total points
ID: 33694989
Control USB drive letters changing USB drive letters
USB Drives are not retaining assigned drive letters

http://www.uwe-sieber.de/usbdlm_e.html

or

Create permanent folders and share over a network

http://www.pcstats.com/articleview.cfm?articleid=1676&page=9

The storage manager in Windows XP
, like Windows 2000 before it, allows you to mount a partition (which would normally be represented with a drive letter like c: or d:) as a directory inside a different partition. Using this method, you could add a new hard drive to your computer and mount it in a directory on your existing c: drive called 'new drive,' for example. The target drive (where the directory is located) must be formatted with the NTFS file system to do this.

This is already a cool feature, but it takes on a new twist when used with USB drives, especially if you use more than one drive on your system or network. While drive letters are assigned dynamically, drive mount locations as we described above are not. The upshot of this is, if you give your USB drive a folder location, that particular drive will be associated permanently with the disk location. Every drive can have its own 'home folder' which will be active and available whenever that drive is plugged into the system, and inaccessible when it is not.

I hope this helps !
0
 
LVL 6

Expert Comment

by:che6ausc
ID: 33695008
Make sure you don't have automount disabled using the diskpart command:http://technet.microsoft.com/en-us/library/cc766465(WS.10).aspx
0
 
LVL 6

Expert Comment

by:che6ausc
ID: 33700619
If you can tolerate having your drives reassigned letters by windows, you can delete all the entries in HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices.

There should be one volume guid assigned per device:http://msdn.microsoft.com/en-us/library/aa365248%28VS.85%29.aspx.

Adding and deleteing drives causes this area of the registry to become disorganized with obsolete entries making it more difficult to assign letter values to drives in sequence.  By deleting all the entries and rebooting, the drives are assigned new letters in sequence making it much more manageable.

If this is a problem, you may be able to arrange the letters as they were through disk management.
Capture.jpg
0

Featured Post

IT, Stop Being Called Into Every Meeting

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

Suggested Solutions

INTRODUCTION The purpose of this document is to demonstrate the Installation and configuration of the Data Protection Manager product. Note that this demonstration was prepared on the basis of Windows OS is 2008 R2 and DPM 2010. DATA PROTECTI…
The article will include the best Data Recovery Tools along with their Features, Capabilities, and their Download Links. Hope you’ll enjoy it and will choose the one as required by you.
Windows 8 comes with a dramatically different user interface known as Metro. Notably missing from the new interface is a Start button and Start Menu. Many users do not like it, much preferring the interface of earlier versions — Windows 7, Windows X…
Windows 8 came with a dramatically different user interface known as Metro. Notably missing from that interface was a Start button and Start Menu. Microsoft responded to negative user feedback of the Metro interface, bringing back the Start button a…

708 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

Need Help in Real-Time?

Connect with top rated Experts

15 Experts available now in Live!

Get 1:1 Help Now