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Yesterday, I began encrypting a 500GB harddisk. Now I have to go to college and during my absense, I want to hibernate an undergoing bitlocker encryption. But I want to know if this is going to create problem on my harddisk.

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up vote 7 down vote accepted

No, it will pick up where it left off.

What happens if the computer is turned off during encryption or decryption?

The BitLocker encryption and decryption processes can be interrupted by turning the computer off, and it will resume where it left off the next time Windows starts. This is true even if the power is suddenly unavailable.

Source: http://technet.microsoft.com/en-us/library/cc766200%28WS.10%29.aspx

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I stand partially corrected. – Hello71 Jun 3 '10 at 2:13
    
What if there is a sudden power cut – Starx Jun 3 '10 at 5:50

I think not, but pause it first to be sure. I'm pretty sure there's an option to pause on whole volume encryption as well as removable drive encryption.

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