TC volume on crashed hdd copied to a new hdd

[darthinti]

Hello @all,

while tc encrypts a disk - a hardware error occurred -> Encryption is not finished, not possible to mount

i copied with dd the whole damaged and unfinished hdd to another hdd

now I get a message from tc "finish unfinished encryption" -> click yes, type my correct password and i get another message from tc "no truecrypt volume found" - the same procedure with the damaged hdd works - but hangs over hours on the same position -> write damaged sector with "0" doesnt help.

how can i finished this procedure on the healthy hdd?
where TC stores unfinished pointer data or something else to remember? Because tc can not find a valid volume, something disturbs tc at the copy.

best regards
Joe

[The00Dustin]

If you used DD to an exact same sized disk, I would expect it to work. If the disk is a different size and you were encrypting the whole disk vs the system partition, it might not work due to expected data at the end of the disk, and moving data might not help even if you know what to move, because the configured size, if stored, still wouldn't match. However, it is also possible that part of an important block was missed by DD depending on what your procedure was. I would recommend trying again with ddrescue.

[darthinti]

I will try again with dd rescue. Despite dd rescue I had discovered differences in the first sectors (only these I have looked at).

There is no indication in the encryption that the hard disk ID or similar was used? -> Entropy? I started reading the source code.

[darthinti]

A new attempt worked!

how 2:
1. SATA: Hard disk not connected = no bios information and smart action while boot
2. boot a linux live cd with ddrescue = DON'T USE ready-made compilations...with wrong parameters!
3. SATA: connect hard disk
4. ddrescue copy the whole drive to another drive with the same size - no manipulation 1:1
-> "ddrescue -f /dev/sd... /dev/sd..."
some hours later....
5. reboot os with unfinished tc encryption - and tatatataaa it is possible to finish the progress