[dm-crypt] yet another header reconstruction question
arno at wagner.name
Wed Feb 24 17:24:55 CET 2016
Excellent. Also, thank you for the feedback!
On Wed, Feb 24, 2016 at 09:43:02 CET, Florian Dotzer wrote:
> On 02/18/2016 02:51 AM, Florian Dotzer wrote:
> >> I tried dd on files to replace the first 512 bytes of a file , but
> >> the target file was completely replaced with this command :
> >> dd if=512_bytes_with_fixed_header of=file_with_first_64_MB_of_md0 bs=512 count=1
> > When the target is a file, you need to include "conv=notrunc" so
> > that the file will not be truncated to zero length when it is
> > opened. That is not an issue when the target is a block device,
> > but there is no harm in using "conv=notrunc" there, too.
> Thanks to Bob , Arno , Sven and all others. I was able to remount
> with the corrected LUKS Header .
> Now I have a backup of the header and a backup of the key.
> currently I am backing up all data
> Please enjoy a virtual drink of your choice ;-))
> Sorry lsblk command was not available so I cannot report any output of that.
> best wishes to all , Florian
> dm-crypt mailing list
> dm-crypt at saout.de
Arno Wagner, Dr. sc. techn., Dipl. Inform., Email: arno at wagner.name
GnuPG: ID: CB5D9718 FP: 12D6 C03B 1B30 33BB 13CF B774 E35C 5FA1 CB5D 9718
A good decision is based on knowledge and not on numbers. -- Plato
If it's in the news, don't worry about it. The very definition of
"news" is "something that hardly ever happens." -- Bruce Schneier
More information about the dm-crypt