Hi, On Wed, 12 Sep 2018 at 15:21:00 +0000, procmem wrote: > cryptsetup convert /dev/vda5 --type luks2 --debug > […] > Cannot convert device /dev/vda5 which is still in use. > […] > Command failed with code -5 (device already exists or device is busy). As the error message indicates, you need to remove (ie, close) the mapped device first. If that device is required for your system to run (for instance if it's holding the root file system) you won't be able to run `cryptsetup luksClose $name` from the main system; however you should be able to perform `cryptsetup convert` from a live CD, or from the initramfs image. Also, if as you hinted at you're using a detached header, you'll need to pass --header=/path/to/header to `cryptsetup convert`. Cheers, -- Guilhem.
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