thank you Mr_spokk and Mr. Žabkar.
How important is PCB revision
symwave sw6316-3vb14 d12823 00 and sw6316-3vb14 d1499 00

reallymine is a program that decrypts the encrypted hard drives of Western Digital MyBook and MyPassport external hard drives (and some rebranded derivatives).

Currently, it can only decrypt JMicron and Initio bridge chip-based devices that use AES-256-ECB encryption. I'd love to expand this to cover Symwave and PLX/Oxford Semiconductor bridge chips and the other known encryption modes, but I need your help; see below. It also does not currently handle entering passwords; if your drive is password-protected (and the bridge chip requires a password) but most of the work is already there (in kek.go); I just need to write the code that actually lets you type in a password, and then we'll be fine.

Simply run the program, providing the drive to decrypt and a file that the decrypted image will be stored to:

reallymine encrypted decrypted

Merged the Symwave decrypter into the main program since it now seems to work fine.

Doesn't encryption usually have very high entropy? Are you saying this dump is part of the key, salt or some other part of the encryption itself? I don't see how this can be encrypted data.

The dump is sector 0. The repeating pattern of 16 bytes (= 128 bits) is consistent with encrypted zeros.