Windows 10: BitLocker Drive Decryption stuck For days...

my Toshiba 3TB hard drive is stuck at 80.3% for the past 3-4 daysNo progressduring the 3-4 days, it keeps decrypting all the time and never goes on at 80.3%Even now it is stuckNo read-write process from 3-4 days on this driveDuring the decryption process, the read-write speed is usually 100MBps BothReadingAndWritingCurrently NIL.....BTW I can still access the data with the same Read-Write speed as earlierIt decrypted to 80.3% in 6-7hrs for your infoI had also performed a surface test and found no disk errors !!

:)

 

[HELP] Bitlocker decryption stuck at 82.1% (No disk activity)

I have been decrypting bitlocker on my USB disc drive for the past two days, and I recently noticed that it had been at "82.1% Completed" for hours. Task manager now shows 0% disc activity for the drive, whereas before it was 100% (for the past two days).

Drive: 4TB (USB HDD drive) Bitlocker (full) encrypted, auto-unlock enabled. Recovery key working.

Main usage: Backups

Unique information on the drive: 1TB of data not backed up anywhere else

Windows version: 10 Pro 64-bit 1909

Bitlocker version: 2.0

USB port: 3.0

What I have tried:

1a. Pausing and resuming BitLocker

1b. Rebooting the machine and trying again

1c. Booting into safe mode and trying again

1d. Booting into recovery mode (X:\ administrator command prompt) and using "manage-bde"

1e. Disabling Secure Boot in the BIOS and trying again

1f. Enabling CSM in the BIOS and trying again

1e. Using "manage-bde" to pause, resume, start encrypting and then start decrypting again (on steps 1b, 1c, and 1d).

1f. Connecting the drive to another Windows 10 Pro 64-bit computer and trying steps 1a and 1e.

1g. Running "chkdsk" in an administrator command prompt, and via the GUI version in drive properties, both said no errors were found.

1h. Attempting to use "repair-bde F: G: -rp [Full recovery password, that has been tested and is working] -Force", however I don't have another drive that is 4TB capacity (the "G" drive is a 32GB USB stick). Output:

Bitlocker Drive Encryption: Repair Tool version 10.0.18362

Copyright (C) 2013 Microsoft Corporation. All rights reserved.

LOG ERROR: 0xc000003d

Needs at least 3815318 MB of free space for repair.

ERROR: Not enough free space on output volume to perform repair.

What I have observed:

1. 30-60% disc activity on the drive for about a second on steps 1a, 1b, 1c,

2. 100% disc activity on the drive when using "manage-bde -on F:" (re-encrypting the drive)

3. 100% disc activity on the drive when using "manage-bde -off F:" (decrypting the drive again) AFTER step 2, but only until (I assume) BitLocker gets to the same place where it was stuck before, as disc activity drops to 0%. This leads me to believe that
BitLocker may be getting stuck in a particular place or on a particular file.

4.

I still have full access to the drive and can read/write perfectly fine. Have successfully viewed files, added files and removed files (for testing). I can read/write perfectly fine on both Windows machines I tested on.

TLDR: Bitlocker decryption of a 4TB USB HDD stuck at 82.1% with 0% disc activity for hours. No errors found on the drive, files still fully accessible.

I have already contacted an "IT Pro/Admin" from Microsoft Support who guided me with steps 1e and 1f, but BitLocker still appears to not be doing a lot.

I have also looked at the BitLocker event logs, but nothing about errors is displayed, simply status messages such as "BitLocker decryption was started for volume F:." and "The BitLocker protected volume F: was unlocked. Protector GUID: {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}
Identification GUID: {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}"

If you have any ideas or suggestions for fully decrypting the drive, please let me know.

 

How to turn bitlocker "again" on a drive which was previously bitlocker decrypted? Please Help!

Hi,

Device encryption helps protect your data by encrypting ("scrambling") it. Only someone with the right encryption key (like a password) can decrypt ("unscramble") it.

• Sign in to Windows with an administrator account.
• Go to Start, enter encryption, and select
  Change device encryption settings from the list of results.
• Select Manage BitLocker, select Turn on BitLocker, and then follow the instructions.

Also, please refer to the below link and check if it helps.

Windows BitLocker Drive Encryption Step-by-Step Guide

Windows BitLocker Drive Encryption Step-by-Step Guide | Microsoft Docs

Please let us know if the issue is resolved or you need any further assistance,

Thank you.

Have a good day!

 

BitLocker stuck

Hi Tamnu,

Your concern is more complex than what is typically answered here in Microsoft Answers forums. We suggest to post this query in our
TechNet Forums, where the audience are more inclined when it comes to this type of topic.

You may also check out this thread from the TechNet Forums, as it has an answer to a similar concern like yours:

• Bitlocker Decryption Stuck

If you have further queries, don't hesitate to contact us.