BTRFS-MAP-LOGICAL(8)                                          BTRFS                                          BTRFS-MAP-LOGICAL(8)

NAME
       btrfs-map-logical - map btrfs logical extent to physical extent

SYNOPSIS
       btrfs-map-logical <options> <device>

DESCRIPTION
       btrfs-map-logical  can be used to find out what the physical offsets are on the mirrors, the result is dumped to stdout by
       default.

       Mainly used for debug purpose.

OPTIONS
       -l|--logical <logical_num>
              Logical extent to map.

       -c|--copy <copy>
              Copy of the extent to read(usually 1 or 2).

       -o|--output <filename>
              Output file to hold the extent.

       -b|--bytes <bytes>
              Number of bytes to read.

EXIT STATUS
       btrfs-map-logical will return 0 if no error happened.  If any problems happened, 1 will be returned.

SEE ALSO
       mkfs.btrfs(8)

6.6.3                                                      Mar 31, 2024                                      BTRFS-MAP-LOGICAL(8)