[dm-crypt] moving/resizing a dm-crypt partition

Louis-David Mitterrand vindex+lists-dm-crypt at apartia.org
Thu Jan 30 17:04:44 CET 2014


Hi,

My linux system is on a dm-crypt volume with btrfs on /dev/sda6. As I
just recovered 100GB from windows (/dev/sda5) I'd like to merge 5 and 6
to have a larger dm-crypt volume. Here is the disk layout:

   1            2048         2050047   1000.0 MiB  2700  Basic data partition
   2         2050048         2582527   260.0 MiB   EF00  EFI system partition
   3         2582528         4630527   1000.0 MiB  8300  Basic data partition
   4         4630528         4892671   128.0 MiB   0C01  Microsoft reserved part
   5         4892672       218167295   101.7 GiB   8300  Basic data partition
   6       464865280      1000215182   255.3 GiB   8300  Linux filesystem

What is the best strategy to acheive that? I'm thinking of booting a
live cd, creating a new dm-crypt volume on 5, copy the system from 6 to
5, remove 6, resize partition 5, cryptfs resize 5, btrfs resize 5.

Is there a better way?

Thanks,


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