man 8 cryptsetup-convert

CRYPTSETUP-CONVERT(8)        Maintenance Commands        CRYPTSETUP-CONVERT(8)

NAME
       cryptsetup-convert - converts the device between LUKS1 and LUKS2 format

SYNOPSIS
       cryptsetup convert --type <format> [<options>] <device> 

DESCRIPTION
       Converts the device between LUKS1 and LUKS2 format (if possible). The
       conversion will not be performed if there is an additional LUKS2
       feature or LUKS1 has unsupported header size.

       Conversion (both directions) must be performed on inactive device.
       There must not be active dm-crypt mapping established for LUKS header
       requested for conversion.

       The --type option is mandatory with the following accepted values:
       luks1 or luks2.

       WARNING: The convert action can destroy the LUKS header in the case of
       a crash during conversion or if a media error occurs. Always create a
       header backup before performing this operation!

       <options> can be [--header, --type, --disable-locks].

OPTIONS
       --batch-mode, -q
           Suppresses all confirmation questions. Use with care!

           If the --verify-passphrase option is not specified, this option
           also switches off the passphrase verification.

       --debug or --debug-json
           Run in debug mode with full diagnostic logs. Debug output lines are
           always prefixed by #.

           If --debug-json is used, additional LUKS2 JSON data structures are
           printed.

       --disable-locks
           Disable lock protection for metadata on disk. This option is valid
           only for LUKS2 and ignored for other formats.

           WARNING: Do not use this option unless you run cryptsetup in a
           restricted environment where locking is impossible to perform
           (where /run directory cannot be used).

       --header <device or file storing the LUKS header> 
           Use a detached (separated) metadata device or file where the LUKS
           header is stored. This option allows one to store ciphertext and
           LUKS header on different devices.

           For commands that change the LUKS header (e.g. luksAddKey), specify
           the device or file with the LUKS header directly as the LUKS
           device.

       --help, -?
           Show help text and default parameters.

       --type <device-type> 
           Specifies required device type, for more info read BASIC ACTIONS
           section in cryptsetup(8).

       --usage
           Show short option help.

       --version, -V
           Show the program version.

REPORTING BUGS
       Report bugs at cryptsetup mailing list <cryptsetup@lists.linux.dev> or
       in Issues project section
       <https://gitlab.com/cryptsetup/cryptsetup/-/issues/new>.

       Please attach output of the failed command with --debug option added.

SEE ALSO
       Cryptsetup FAQ
       <https://gitlab.com/cryptsetup/cryptsetup/wikis/FrequentlyAskedQuestions> 

       cryptsetup(8), integritysetup(8) and veritysetup(8)

CRYPTSETUP
       Part of cryptsetup project <https://gitlab.com/cryptsetup/cryptsetup/>.

cryptsetup 2.7.2                  2025-06-13             CRYPTSETUP-CONVERT(8)