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@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
