Windows 10: Partition drive letter disappears!

I have a new laptop with Windows 11 installed. I created a partition and assigned it the drive letter Z. Sometimes after rebooting, or after waking up the drive letter simply disappears, the partition name is there but not the letter. The partition is fine, I have to reassign the drive letter. I created a Z partition on my old Win 10 laptop and used it for years and never lost the drive letter.Any idea what causes this and how to fix it? I see that other people have the same problem but there has been little response to the questions.

:)

 

How to disappear the Z partition in "This PC"

Hi Disal,

To delete the Z: drive partition, please follow the steps below:

• Press Windows Key + R. Type diskmgmt.msc, then hit
  Enter.
• Right-click on the partition, then select Delete Volume to delete a partition.
  

Note: This option deletes every single file on the partition, please be careful when using it.

We also suggest running Microsoft Safety Scanner to scan and protect your computer from any viruses.

Update us with the result.

 

Drive Letter for Partition Keeps Disappearing on Windows 11

I have a new laptop with Windows 11 installed (no upgrade but clean installation). I have added a partition and assigned it the drive letter Z. Sometimes after rebooting, sometimes after waking up from hibernation mode, sometimes even whilst in use, the drive letter simply disappears. The partition is fine, I "just" have to reassign the drive letter every few days. Any idea what causes that and how to fix it?

 

Drive letter on OEM Partition

Microsoft is aware that previously-hidden partitions are improperly being assigned drive letters after installing the April 2018 Update. As a result, they now appear in Disk Management and File Explorer. These partitions are typically recovery partitions
used by the Windows Recovery Environment or by the Original Equipment Manufacturer. It is not recommended that you attempt to delete or reformat these partitions as this may have adverse effects on your ability to recover Windows. Microsoft is currently working
to address the issue in a future Windows Update, and we’ll update this thread when a solution becomes available.

(Update 5/14/18: The solution that will soon be released via Windows Update will only prevent this issue from occurring for devices that install the April 2018 Update after the solution is released. If you've already installed the April 2018 Update and are
experiencing this issue, you'll need to follow the steps below if you want to hide these partitions.)

Although you can safely ignore these partitions, if you prefer do away with the low disk space warnings and hide the partitions so they no longer appear in File Explorer, you can do so by manually removing the partition’s assigned drive letter. To do this:

1. Select the Start button, type cmd and then right-click Command Prompt in the search results and select Run as administrator.

2. In the Administrator: Command Prompt window, type diskpart and press Enter.

3. Type list volume and press Enter.

4. Make note of the volume number for the drive letter you want to remove. For example, if the drive letter you want to remove is Drive “G”, note the volume number for Drive G.

5. Type the following command, and press Enter.

select volume <volume number>

When typing this command, in place of <volume number>, substitute the volume number you made note of in Step 4. In the example above, if the volume number for drive G is 5, you would type: select volume 5

6. Type the following command and press Enter.

remove letter=<drive letter>

When typing this command, in place of <drive letter>, substitute the drive letter you want to remove. In this example, you would type: remove letter=G

7. Close the Command Prompt window.