[dm-crypt] moving/resizing a dm-crypt partition
arno at wagner.name
Thu Jan 30 22:06:09 CET 2014
On Thu, Jan 30, 2014 at 17:04:44 CET, Louis-David Mitterrand wrote:
> 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?
Yes, most decidedly: Make a full backup of everything
you want to keep on 6, remove 5 and 6, create what you
want in its place and restore the backup.
You may also do a full backup of the rest of the disk,
mistakes and error happen.
As backup is mandatory anyways, this shoud not cause
much more trouble than an ordinary backup.
You are running a pretty high risk of losing everything on
6 with your approach.
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
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