After April Update System partition now has a drive letter assigned

Hi,

After Updating with the April Update yesterday my System /Rescue / UFI partiton (not sure what to call it , but the first partition on the boot drive) now has a drive letter assigned to it.

If I go into Computer Management > Disk Management the only option in the right-click menu is Help so I can't change anything.

This wouldn't be such an issue except I keep getting a warning popping up the the F: drive is low on space.

Is there any way, other than Disk Management, to remove the drive letter assignment?

[Moved from: Windows Insider Program / Windows Insider Preview / Devices and drivers / PC]

 

Question Info


Last updated June 24, 2019 Views 1,049 Applies to:

I seem to have been able to remove it using the command line.

Following this post, https://www.disk-partition.com/diskpart/assign-drive-letter-4125.html

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Please give us a screenshot of Disk Management.
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lacrumb

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That has been happening for a long time.  I believe it occurs because the Boot files are altered to facilitate the Update install and not put back correctly.  You took the correct action but we do not know why it happens on some installs.

It usually happens to the EFI System partition because that is where the boot files are and Z is most often seen letter.

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In my case it made my EFI Recovery partition (In Disk Management it calls it an OEM VOLUME) Drive letter G:

If you look at what is in it there is a Recovery Folder.

What is really lame is it breaks something as I can not remove the drive letter using Disk Management like I would normally be able to do; the only option I get on that volume is HELP which is U S E L E S S !

I am going to use the diskpart method to fix it which I am sure will do it, but ya Microsoft needs to figure out what is happening because it is more than just adding the drive letter it is also changing the partition in some way that Disk Management can no longer do anything at all to that partition, that is what I call breaking it... 

Luckily the system itself still works ok.  

And yes that Low Disk Space thing pops up ever couple of minuets, very annoying...

FYI Diskpart does remove the drive letter just fine, which makes me wonder if there is a bug now in Disk Management...

Also I upgraded 10 machines to the new version and every single one did the very same thing, this same bug came up, so it doesn't appear to be some of them from my point of view it is 100% of all the ones I have been involved with.  Some were clones, 2 were Dell's and a couple others were HP's   They all had the Fall Creators Update if that helps to know.

Scott

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Assigning a drive letter to a recovery partition and then reporting low disk space happened on April 30 version 17134.1.

I was hoping today's release (May 8) would solve it since the version was 17134.48. No such luck. Same issue prevails. The 450 MB partition that was 100% free now is only 10% free and has been assigned drive letter G: on my system. I know how to stop it from appearing in file explorer using Diskpart; but should I have to? I don't think so. I have gone back to .402 and will wait until the next cumulative update to try again and hope for the best.

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Having the Drive letter like that has been a Random Problem for some But I guess I have been one of the lucky ones. No drive letter showing on Disk manager for me. My BIOS is just Legacy and No UEFI, wonder if it could make a difference.

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What I have seen those screen shots those have all been from GPT partitioned disks. 

I was  going to do clean install of 1803 and start using UEFI, but at some point of testing I got that extra partition with assigned drive letter.

After that test I did clean install with Legacy mode without any issue.

On my opinion this is clearly it is only UEFI/GPT issue.

Update = Replace old bugs with new ones.

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I just updated my Samsung TabPro S to 17134.48 from 1734.5 and did not get any extra letter.
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lacrumb

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I thing this issue is concerning updates with full builds, not CU's?
Update = Replace old bugs with new ones.

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There's a REAL simple way to remove the Drive letter, far easier than Diskpart.

Just MAKE SURE you select the correct drive /Letter.

Open a CMD as Admin, type in 

mountvol X: /D   {Press enter}  The screen may flash it may not, Drive will now be hidden, no  need to reboot.

NOTE: Replace X with your drive letter.

Example: lets say the drive letter is F    mountvol F: /D

Windows 10 - Never a dull Moment.

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