Solved Unable to reassign drive letters since 24H2


Catnip

Catnip

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I was moving my Steam games install files to a bigger hard disk and ran into an issue. When I emptied the old drive to the new one, I tried reassigning the old drive (Drive F:) to a new letter, with the intent of changing the bigger drive to drive F: Disk Management went through the procedure, but after it gave me the warning about some software not working, etc. up popped a window saying "Bad parameter". I am thus unable to reassign the drive letter via Windows.

I know I can do it with Diskpart in a command window (maybe) but I am a little nervous about doing it that way. I reassigned my Steam games to Drive E: which is the bigger drive, so I guess the question is moot. A month ago I reassigned a drive letter under 23H2 with no issues, so I can't figure this out. Has anyone seen a bug report about reassigning drive letters? I am unable to find one.
 
Windows Build/Version
Win 11 Pro 24H2

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Catnip said:
I was moving my Steam games install files to a bigger hard disk and ran into an issue. When I emptied the old drive to the new one, I tried reassigning the old drive (Drive F:) to a new letter, with the intent of changing the bigger drive to drive F: Disk Management went through the procedure, but after it gave me the warning about some software not working, etc. up popped a window saying "Bad parameter". I am thus unable to reassign the drive letter via Windows.

I know I can do it with Diskpart in a command window (maybe) but I am a little nervous about doing it that way. I reassigned my Steam games to Drive E: which is the bigger drive, so I guess the question is moot. A month ago I reassigned a drive letter under 23H2 with no issues, so I can't figure this out. Has anyone seen a bug report about reassigning drive letters? I am unable to find one.
Click to expand...

Hi, certainly reads like an problem.

If it were me and I was anxious or in need to complete this, I would use a free disk management software to accomplish the changing of the drive letter. Something like Minitool or AOMEI. Then delv deeper into this issue after it. Perhaps run CHKDSK and DISM’S/SFC
 

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The above recommendation is good but if you want a simple, portable Drive letter changing tool I'd recommend Sodum's Drive Letter Changer.
It's simple & works. Drive Letter Changer v1.4

Sordum is a very similar software site to nirsoft but imo better if only for the consistency of theme & portability. Try not to download their entire roster of utilities, they're so very useful it's a challenge not to.
 

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Look for a System Volume Information folder on an External drive, I delete it.
 

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Morph000 said:
Is the page file on the same drive?

Fix: The parameter is incorrect when changing drive letter in Windows 10 | Password Recovery

To fix the The parameter is incorrect issue in Windows 10, you need to temporarily disable paging files on the drive which you want to change drive letter for.
www.top-password.com www.top-password.com
Click to expand...
Don't ask me how, but there was indeed a page file on that drive. I got rid of it and I was able to change the drive letter. All is now right with the world.

Thank you very much!
 

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At a glance

Win 11 Pro 25H2Intel i7 13700KF32 GB Team Group DDR5 - 6000 CL 30ASUS TUF GAMING RTX 3070 Ti
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Win 11 Pro 25H2
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Self build
CPU
Intel i7 13700KF
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Gigabyte Z790 UD AC
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ASUS TUF GAMING RTX 3070 Ti
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