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Question: Can I use dd to clone my luks encrypted lvm os drive? (lemmy.ml)

submitted 3 days ago* (last edited 2 days ago) by [email protected] to c/[email protected]

9 comments fedilink hide all child comments

EDIT WITH UPDATE: Operation went off without a hitch! I'm now up and running with the 512GB nvme drive! Next stop is dual booting nixos, which was the whole reason for switching to the larger drive.

ORIGINAL POST:

I’ve got a laptop running Arch (btw), with a 128GB nvme in it. The nvme has two partitions. EFI boot, and a luks encrypted lvm.

I’ve got a 512GB nvme I want to swap in. I think I can clone the device with dd, update the uuids, expand the lvm, and drop in the 512 nvme, but my searching hasn't given me a clear confirmation of this. Am I correct in my thought process, or am I setting myself up for disaster?

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[–] wildbus8979 23 points 3 days ago (1 children)

Yup, you're all set. You'll need to use cryptsetup resize as well

[–] [email protected] 5 points 3 days ago

That I didn’t know. Thank you!

[–] [email protected] 8 points 3 days ago (1 children)

@harsh3466 That should work, as always with dd the potential disaster is getting if and of the wrong way around and wiping the old drive.

[–] [email protected] 3 points 3 days ago (1 children)

No joke! I plan to quadruple check before I hit enter.

[–] [email protected] 9 points 3 days ago* (last edited 3 days ago) (1 children)

Tip: don’t use /dev/nvme0n1 directly, but use device aliases in /dev/disk/. I prefer /dev/disk/by-id/ but maybe another works better in your case.

# find all aliases for nvme drives (no partitions)
find /dev/disk/ -type l -ilname '*nvme?n?' -printf '%l %p\n' | sed 's!^../../!!' | sort

[–] [email protected] 4 points 2 days ago (1 children)

That is actually what I did, by-id. The whole operation went off without a hitch. I'm up and running with my new 512GB nvme!

[–] [email protected] 1 points 2 days ago

Congratulations!

[–] [email protected] 1 points 3 days ago (1 children)

Is it LVM2? If you need a GUI I recommend: Blivet-GUI from a bootable USB environment so as you said nothing is mounted, hope this helps!

[–] [email protected] 2 points 3 days ago

It is lvm2. Thank you for the recommendation! I'll check it out though I think I'm going to stick to the CLI for this one. I kind of want to do it manually.

I do plan to work from a bootsble USB for all the dd work so that nothing is mounted/in use.