Int. HD partition Keeps Disappearing (Z Drive) others are OK

  1. Lottiemansion's Avatar
    Posts : 105
    Windows 10 Home 64 Bit
       #1

    Int. HD partition Keeps Disappearing (Z Drive) others are OK


    I Have an internal HDD drive with multiple partitions & one keeps loosing it's letter? It keeps disappearing and I have to re-assign it and reboot.
    Int. HD partition Keeps Disappearing (Z Drive) others are OK-disk-mapping.jpg
    This has been happening for a few versions but I'm getting fed up of it now.


    Anyone have any ideas as to how I can stop this?

    Thank you.

    Windows 10 Version 20H2 (OSBuild 19042.985)
      My Computer

  2. Megahertz's Avatar
    Posts : 2,859
    Windows 7 HP 64 - Windows 10 Pro - Lubuntu
       #2

    Witch drive and witch partition keeps losing the assigned letter?

    PS: Sorry, just seen it is Z:
      My Computers

  3. NavyLCDR's Avatar
    Posts : 15,784
    Windows 10 Pro
       #3

    In a command prompt with admin privileges try:

    Code:
    diskpart
    select vol z
    remove
    automount scrub
    assign letter=z
    exit
    exit
    Note the above commands must be started when Z: drive is present.
      My Computer

  4. Lottiemansion's Avatar
    Posts : 105
    Windows 10 Home 64 Bit
    Thread Starter
       #4

    Hi,

    I have previously scrubbed the automount points for this drive, but the problem persisted.

    I have done it again so I will let you know, soon.

    - - - Updated - - -

    Hi,

    Booted up ok 3 times, but it looses the drive letter whilst sat doing nothing, screen saver active.

    Int. HD partition Keeps Disappearing (Z Drive) others are OK-disk-mapping-lost-letter.jpg

    Any more suggestions?
    Last edited by Lottiemansion; 19 May 2021 at 12:27.
      My Computer

  5. jumanji's Avatar
    Posts : 6,685
    Windows 10 Home 64bit Version 21H1
       #5

    Hi @Lottiemansion

    Try increasing/decreasing the size of the last partition Z: without losing any data. Then check whether you lose your drive letter.
    Reason: It is quite possible that the start sector of the partition where the Volume Boot Record resides is weak. If that is what is causing the frequent disappearing , shifting the start sector even by one sector may resolve the problem.

    Note: You may do well to do a Surface Test of that HDD.
      My Computer

  6. Lottiemansion's Avatar
    Posts : 105
    Windows 10 Home 64 Bit
    Thread Starter
       #6

    Hi and thank you for contributing .

    I have resized & moved the drive as you can see. Lets hope this helps!

    Int. HD partition Keeps Disappearing (Z Drive) others are OK-disk-remapped.jpg
    All good on checking disk.
    Int. HD partition Keeps Disappearing (Z Drive) others are OK-disk-check.jpg

    - - - Updated - - -

    This seems to be working! I Will report back soon.........

    Int. HD partition Keeps Disappearing (Z Drive) others are OK-disk-mapped.jpg

    - - - Updated - - -

    No issues so far.
    Thanks to all who have contributed to the solution of this issue.
    Last edited by Lottiemansion; 21 May 2021 at 16:23.
      My Computer

  7. jumanji's Avatar
    Posts : 6,685
    Windows 10 Home 64bit Version 21H1
       #7

    Glad to know that the issue got resolved by shifting the Volume Boot Record at the start sector of the partition ( by resizing the partitions). Nothing to be alarmed at this point but periodically do run a surface test and check. For peace of mind, you may also check the health of the HDD with the Limited Trial/Free version of Hard Disk Sentinel Download Hard Disk Sentinel

    Int. HD partition Keeps Disappearing (Z Drive) others are OK-24-05-2021-11-04-39.jpg
    Last edited by jumanji; 24 May 2021 at 00:38.
      My Computer

  8. Lottiemansion's Avatar
    Posts : 105
    Windows 10 Home 64 Bit
    Thread Starter
       #8

    Hi,

    It has just happened again, drive missing but was there on booting?

    AAAAAH.
      My Computer


 

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