Bitlocker does not Auto-Unlock Fixed Data Drive

Bitlocker questions are usually outside of the scope of this forum. They are usually better handled on the TechNet forum https://social.technet.microsoft.com/Forums/en-US/home

I assume you set up auto unlock using the instructions here http://windows.microsoft.com/en-US/windows-8/unlock-bitlocker-protected-drive

Cross-posted to here to correct.

You are correct about how I set it up. Still doesn't work.

Haven't received any helpful responses in either forum. 

Drive still shows auto-unlock enabled with the required protectors, but will not unlock when windows starts. I've reluctantly moved all data to the OS drive until I can get this fixed, but it's a major problem. 

Hi,

Thank you for posting your query in Microsoft community.

Please answer the below question to understand the issue better.

Which hard disk is not supporting with auto unlock?

I would appreciate if you provide the error with screen shots.

I suggest you to refer the below link to unlock the drives.

http://windows.microsoft.com/en-US/windows-8/unlock-bitlocker-protected-drive

It is a Samsung 850 EVO used as as fixed data drive. The OS drive is encrypted with Bitlocker, using TPM+PIN+StartupKey. There is no error message: I can encrypt the drive just fine, and unlock it just fine after startup using any other protector I have enabled. However, while the Auto-Unlock feature shows that it is enabled, after each startup the drive is inaccessible until I use, e.g., a password to unlock it. I have seen the below link many times. It does not describe my problem, or any potential solution to it. 

(All of which was shown in my OP.)

https://social.technet.microsoft.com/Forums/en-US/home  is the best place for bitlocker questions. The issue could be the drive controllers, chipset drivers, or any other driver or a BIOS update.

Your link leads here http://windows.microsoft.com/en-US/windows-8/unlock-bitlocker-protected-drive

Trey,

Apologies for digging this year old post up but I am having the exact same issue you described.  I too have a Samsung 850 EVO (actually 3 of them, 1 x system drive and 2 x fixed data drives).

Just wondering if you found a resolution to this issue?  It is driving me nuts!  I have tried just about everything and am now out of ideas.

I did get the auto-unlock feature working consistently when the encryption is software based however given the 850 EVO drive is a self-encrypting drive, plus the other benefits, I would much prefer hardware based encryption via eDrive and BitLocker.

Would really appreciate any help or other info you may have gathered.

Thanks in advance!