I recently obtained a disk dock and cloning unit (StarTech.com) for working with some of my internal drives (I have too many). This unit does a bit-by-bit clone of one disk to another, which is really useful! The problem with this is that each disk now looks exactly the same to your Operating System, meaning there is no way to mount them both at the same time!
Furthermore, I decided to create a LUKS encrypted drive protecting an ext4 partition. This means that both the LUKS layer and the ext4 layer have their own UUID’s, which both need to be changed.
After doing some quick google’ing, I successfully did this in no-time!
There is a fancy library called
libuuidyou can utilize to generate a uuid using
uuidgenon the cli! It already comes with the
e2fsprogspackage so you should have it!
Get drive info
sudo blkid /dev/sdb: UUID="0bbfe23e-921f-46df-89a0-e299032688ef" TYPE="crypto_LUKS" /dev/mapper/luks-0bbfe23e-921f-46df-89a0-e299032688ef: LABEL="44plus" UUID="ced07e6b-f0f6-4d07-81d6-58999306e14e" TYPE="ext4"
Change ext4 partition UUID
Note that I decided to do the ext4 partition first, and then unmount and do the LUKS layer. Either way should work just fine, just ensure you point to the correct
sudo tune2fs -U 6a62939e-9d02-4cd1-ad50-297d166daf23 /dev/mapper/luks-0bbfe23e-921f-46df-89a0-e299032688ef
Change luks UUID
sudo cryptsetup luksUUID --uuid=5371cc8d-c027-4f4d-aa49-19d32efd57d0 /dev/sdb
Now you can successfully mount both drives on the same machine!