General discussion

Drive Letters Disappeared in Disk Management Console !

Can somebody Help, please ?
Although I can see all drive and partitions letters in My Computer, when I go to Disk Management Console all Fixed Disks & Partitions letters have been disappeared. I use Windows XP Pro.
Thanks in advance - Michael

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Computer Management

Go to Computer Management > Actions > All Tasks > Change Drive Letters and Paths.

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It's more complicated, thanks anyway

When I do this, the drive letters I need (C, D, E, etc) are not available..... ???

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When I don't log in as administrator...
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Everything looks OK....

I logged in as administrator and as the Administrator.
Logical Disk Manager Service is, also, running.
In LDM properties, I can see the path to executable :
''D:\Windows\System32\svchost.exe -k netsvcs''.
Is that normal ?

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No. Not normal.

99% of the time that would be on C:

Is there something odd about this install?

Bob

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Could we try something else ?

Dear Bob,
It's a dual boot system, so disk C: (HDD 1) is the boot disk and the system disk for Windows 98 and disk D: is the system disk for Windows XP Pro. Additionally, HDD 2 is partitioned to D:, E:, H: and CD-ROMs are F: & G: drives.
Any other idea ?
Thanks - Michael

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That's a big clue. Please

Tell the rest of the story. Since the usual didn't help, you might be using Partition Magic or some other tool that causes this.

Bob

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Think so ?

Yeap, I really use Partition Magic but till now I didn't have any problem like this. Maybe thinks changed when I installed an update of Acronis True Image 8.0. Is there something we could do, Bob ?
Thanks - Michael

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Yes, that's a really big clue.

I've seen this happen with Partition Magic. Sadly, the cure is to call PM support and have them sort it out. You are not using the stock tools so such things do happen. About Acronis, I remember that it may have some service or other tool installed which is optional. What happens if you uninstall Acronis entirely? Might help, might not.

At least we know this may be yet another PM disaster.

Bob

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You are not alone. Link.
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Maybe it isn't so serious, hope....

Dear Bob,
where I could send you a display image to take a look what I can see in my Disk Management Console and what in My Computer ?
Michael

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Possible Solution

Things to check. In the registry editor go to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E967-E325-11CE-BFC1-08002BE10318}
Verify you have a Multi-String key called UpperFilters with the value PartMgr.

Next in the registry editor go to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{71A27CDD-812A-11D0-BEC7-08002BE2092F}
Verify you have a Multi-String key called UpperFilters with a value VolSnap.

Then in Explorer goto C:\WINDOWS\system32\drivers and verify you have the files partmgr.sys and volsnap.sys.

Make any corrections as needed and, if anything was corrected, reboot the computer. Hopefully you will now have your drive letters back in Disk Management.

Regards,

Mr. Crabbs

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Tell more.

Why or what changes these?

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Reply

You would hope that nothing would try to change these values, however just about anything could I suppose. One possibility that comes to mind would be the installation of disk management software that was intended to modify the functional behavior of the disk management app. It could install different drivers and change the values in the registry keys to point to them instead. Then if the software were uninstalled and the registry keys were not correctly written back, or the original drivers had been deleted and not restored you would see this problem. I believe this is an all to common issue with uninstalls. Not that you always see things that used to work quit working, but you rarely see an uninstall remove or restore all the registry keys that were modified/written during the install of software.

Regards,

Mr. Crabbs

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That's it !!!

Mr. Crabbs you're absolutely right. PartMgr was the problem. That was created by Acronis TrueImage 8.0 application and not by PartitionMagic, as my friend Mr. Proffit thought.
Thanks all, anyway.
Michael

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