Re: Drive Letters

Tech-Archive recommends: Fix windows errors by optimizing your registry

From: David (david1133_at_REMOVE-TO-REPLYoptusnet.com.au)
Date: 11/08/04


Date: Mon, 08 Nov 2004 23:40:28 +1100

And Jax, just to set the record straight, here is another method of
changing the drive letter of the boot drive without reinstalling the OS

You do not need to grovel or anything - just a polite apology will
suffice

David - who is really having fun pointing out to Jax the error of his
ways

Response Number 5
                         Name: Kurt (by Kurt S)
                         Date: November 01, 2004 at 13:08:57 Pacific
                         Subject: Drive letter is F:, Want to change
                         Reply:

                                Yes you can according to Microsoft

                                HOW TO: Change the System/Boot Drive
Letter in Windows
                                The information in this article applies
to:
                                Microsoft Windows 2000 Server
                                Microsoft Windows 2000 Advanced Server
                                Microsoft Windows 2000 Professional
                                Microsoft Windows 2000 Datacenter Server

                                This article was previously published
under Q223188

                                IN THIS TASK
                                SUMMARY
                                Changing the System/Boot Drive Letter

                                IMPORTANT: This article contains
information about modifying the
                                registry. Before you modify the
registry, make sure to back it up and
                                make sure that you understand how to
restore the registry if a problem
                                occurs. For information about how to
back up, restore, and edit the
                                registry, click the following article
number to view the article in the
                                Microsoft Knowledge Base:
                                256986

<http://support.microsoft.com/default.aspx?scid=kb;EN-US;256986>
                                Description of the Microsoft Windows
Registry
                                SUMMARY
                                This article describes how to change the
system or boot drive letter in
                                Windows. For the most part, this is not
recommended, especially if the
                                drive letter is the same as when Windows
was installed. The only time
                                that you may want to do this is when the
drive letters get changed without
                                any user intervention. This may happen
when you break a mirror volume
                                or there is a drive configuration
change. This should be a rare occurrence
                                and you should change the drive letters
back to match the initial
                                installation. NOTE: Please be aware of
the following issue related to drive
                                letters:
                                249321

<http://support.microsoft.com/default.aspx?scid=kb;EN-US;249321>
                                Unable to Log on if the Boot Partition
Drive Letter Has Changed

                                WARNING: If you use Registry Editor
incorrectly, you may cause
                                serious problems that may require you to
reinstall your operating system.
                                Microsoft cannot guarantee that you can
solve problems that result from
                                using Registry Editor incorrectly. Use
Registry Editor at your own risk.

                                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.

                                This procedure swaps drive letters for
drives C and D. If you do not need
                                to swap drive letters, simply name the
\DosDevice\letter: value to any new
                                drive letter not in use.

                                back to the top

                                Changing the System/Boot Drive Letter
                                Make a full system backup of the
computer and system state.
                                Log on as an Administrator.
                                Start Regedt32.exe.
                                Go to the following registry key:
                                HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices

                                Click MountedDevices.
                                On the Security menu, click Permissions.

                                Check to make sure Administrators have
full control. Change this back
                                when you are finished with these steps.
                                Quit Regedt32.exe, and then start
Regedit.exe.
                                Go to the following registry key:
                                HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices

                                Find the drive letter you want to change
to (new). Look for
                                "\DosDevices\C:".
                                Right-click \DosDevices\C:, and then
click Rename.

                                NOTE: You must use Regedit instead of
Regedt32 to rename this registry
                                key.
                                Rename it to an unused drive letter
"\DosDevices\Z:". (This will free up
                                drive letter C: to be used later.)
                                Find the drive letter you want changed.
Look for "\DosDevices\D:".
                                Right-click \DosDevices\D:, and then
click Rename.
                                Rename it to the appropriate (new) drive
letter "\DosDevices\C:".
                                Click the value for \DosDevices\Z:,
click Rename, and then name it back
                                to "\DosDevices\D:".
                                Quit Regedit, and then start Regedt32.
                                Change the permissions back to the
previous setting for Administrators
                                (this should probably be Read Only).
                                Restart the computer.

David wrote:

> and also please note that if my advise is wrong, then MS is also wrong
> as it was their information that drove my reply
>
> Note that they specifically refer to changing the boot volume letter -
> if they are wrong? then...
>
> But of course I cannot take responsibility if their info is wrong -
> but I do remember changing the letters on my HDs a while ago
>
> David
>
>
>
> SYMPTOMS
>
> When you install or upgrade to Windows XP, the system partition (the
> disk volume that
> contains the Ntldr, Boot.ini, and Ntdetect.com files) may be assigned
> a drive letter other than
> the one that you expect. The system partition may be assigned a drive
> letter other than drive
> C.
>
> CAUSE
>
> This problem may occur if you have a ZIP drive that is connected to
> the computer when you
> install Windows. This problem occurs when the computer detects the
> ZIP drive as a hard
> disk.
>
> RESOLUTION
>
> To resolve this problem, use Disk Management to change the drive
> letter assignments in
> Windows XP. For additional information about how to change drive
> letter assignments in
> Windows XP, click the article number below to view the article in the
> Microsoft Knowledge
> Base:
> 307844 HOW TO: Change Drive Letter Assignments in Windows XP
> NOTE: This problem does not damage your computer.
>
> STATUS
>
> Microsoft has confirmed that this is a problem in the Microsoft
> products that are listed at the
> beginning of this article.
>
> MORE INFORMATION
>
> For additional information about System partitions and Boot
> partitions, click the article
> number below to view the article in the Microsoft Knowledge Base:
> 314470 Definition of System Partition and Boot Partition
>
>
> David wrote:
>
>> JAX wrote
>>
>> >
>> > David, judging by your own posts, I think you should refrain from
>> offering
>> > advice to others.
>>
>> ...and I would suggest the same to you - until you learn a little
>> more about
>> good manners
>>
>> David
>



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