Does this DVR allow the recordings to be saved to an external drive in unencrypted form? If so, then I'm wondering if there is any way to "trick" the DVR into decrypting its erased content.
Perhaps you could record a single encrypted session on a test drive. Ensure that this session fills the entire drive and occupies a single file. Then patch your customer's data into this test file and save it to your external drive. Of course this assumes that the encryption key is the same for all drives. Also, the decrypted test file probably won't be playable, but it may be scan-able.
I suppose you could also do a little research by taking a blank drive and recording a very short session, say 1 second. Then clone the result. Next, set a password and clone it again. Then compare the user areas and the SA/NVRAM/etc.
_________________ A backup a day keeps DR away.
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