As you may know, BitLocker Drive Encryption only encrypts the C:\ drive. If you have additional drives in your PC, or use an external USB hard drive with your notebook, you can’t encrypt that drive with BDE. Officially that is :)
While Vista SP1 will bring support for encrypting the other volumes in your system you can do it today using the command line tool manage-bde.wsf. Now before we get started I must inform you that this is in now way supported by Microsoft. I’ve tried it, it worked for me, but I highly recommend taking a backup of the data before proceeding!
With that out of the way launch the Command Prompt as Administrator and run the following command to encrypt additional drives:
cscript manage-bde.wsf -on X: -recoverykey Y:\ -recoverypassword
In this example X: is the drive you wish to recover and Y: is the drive the recovery key will be saved to. Remember to backup the recovery key and store it in a secure location. You can store this key on the C: drive (which is encrypted) and it will make things easier when you need to unlock the drive.
Once that is complete you will need to run a command to “unlock”
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