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btrfs-map-logical(8)
====================
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
--------
:doc:`mkfs.btrfs`
|
