BTRFS-MAP-LOGICAL(8) Btrfs Manual 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 into stdout in 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) Btrfs v4.4.1 11/05/2016 BTRFS-MAP-LOGICAL(8)