Bitlocker issues with Windows 8.1

Try encrypting the OSX side first so that any Mac related drives will not be picked up by bit locker.

 

Different machines but think FileVault took under 20 minutes on +200gb on a nMP, think about 35 minutes on +400gb for a rMBP

 

What do you mean you can't access the Windows side? Option boot and you can't see a Windows volume? We have filevalut and bitlocker on a few machines with Windows in boot camp and haven't had any issue with either OS (the only you can no longer do is access the other OS partition from the current OS, i.e. look at Mac files while running Windows).

 

Strange, we have the same setup on late 2013 rMBP and late 2013 MP and have no problem switching between Win and OSX. I'm not on our machines, but I do recall that the software switchers may not show the other volume but option booting still works.

I will try to see if I can try it tonight to see what we did differently.

 

I might owe you an apology, think I might have it reversed it. Now think I fully encrypted Windows first then went back to OSX filevault.

I was thrown off by your mention of an error by bitlocking first, but the partition you saw may have been the new Windows partition that bitlocker creates as part of its own process?

I recall my thinking being if bitlocker is going to mess around with disk partitions, I want the disk as accessible as possible so left Mac encryption as my last step once bitlocker was running fine.

If it was in fact the OSX recovery partition that was bitlocked, that I do not understand.

But as silver lining, I know it does work on other 2013 machines so hopefully your MBA will work as well.

Related, I presume you've already executed the TPM hack?
http://www.7tutorials.com/how-enable-bitlocker-without-tpm-chip-windows-7-windows-8

 

I may have to secure another rMBP, will post back what worked for me

 

No hitches on another late 2013 rMBP, ran bitlocker on Win first then fv on OSX.

In Win, I can see the OSX as a startup disk choice in boot camp control panel, but I cannot see Win as a startup disk in OSX system preferences. Option boot to either OS works, so it doesn't matter.

Not sure why your install grabbed the recovery partition. I did choose to bitlock 'used space' (not entire disk) so maybe that's the issue?

 

Unfortunate update, ran prior steps on another nMP and now stuck in OPs situation, OSX can't be found beyond the recovery partition. The partition itself is still there but it now reads as a 'windows' partition when you click the boot camp icon and doesn't appear when I option boot.

Maybe this is a coin flip, sometimes it works and other times it doesn't. The only notable difference is earlier, we encrypted both OSs on fresh machines while here we tried on a machine that had been in service for about a month.

 

Does any of this help?
http://joeraff.org/20131010/how-to-...aneously-on-a-dual-boot-mac-running-bootcamp/

 

good resource, seems like it will work but will spend a little longer trying to figure out why it worked before with no 'manual' steps at all

 

More strange stuff. I can't explain why, but it seems like the order of encrypting doesn't matter but it does seem to go haywire if you do it on a machine that's been used for a bit.

My earlier posts were based on a fresh machine, we ran bitlocker then fv with no issue

Today, on a fresh machine, we ran fv then bitlocker with no issue

The issue was yesterday, we tried encrypting on an in-service machine

So, short story, it can work fine with both bitlocker and fv on a fresh machine. Perhaps that link is necessary for an in service machine?

 

Last update for those interested, confirmed on 2nd machine that opposite steps worked (ran fv first then bitlocker, this is the same machine where we used bitlocker first then fv originally)

this was also a fresh machine, both OSs were clean installed

no special terminal commands or anything needed and now have both OSs encrypted

 

Once you get both drives encrypted, the only way I've found to boot into the other is with holding the option ket and selecting the drive.

 

Using New Mac Pro Late 2013 with 6core, 64ram(after market), 1tb, dual 700, 2 -27 inch thunderbolt display and installing 8.1 pro.

If you encrypt the windows HD first with bitlocker then it will resize and blow away your mac partition. The only Hard drive left to select during option key boot up will be the windows install. The Mac OS will need to be reinstalled or time machined.

However, if you use filevault first to encrypt your OS drive then bitlocker won't be able to resize your mac partition, thus leaving it intact. Then install bitlocker with no problems.

Once again. The only way I've found to boot into the other encrypted drive is to hold the option key during boot and select the OS drive you want to boot from. The bootcamp shell/ startup disk can no longer find the encrypted drives.

What a complete b this was to do but glad I got it working.