2014-04-02 08:29:32 +00:00
|
|
|
btrfs-map-logical(8)
|
|
|
|
|
====================
|
|
|
|
|
|
|
|
|
|
NAME
|
|
|
|
|
----
|
|
|
|
|
btrfs-map-logical - map btrfs logical extent to physical extent
|
|
|
|
|
|
|
|
|
|
SYNOPSIS
|
|
|
|
|
--------
|
2014-05-19 15:49:35 +00:00
|
|
|
*btrfs-map-logical* <options> <device>
|
2014-04-02 08:29:32 +00:00
|
|
|
|
|
|
|
|
DESCRIPTION
|
|
|
|
|
-----------
|
2014-05-19 15:49:35 +00:00
|
|
|
*btrfs-map-logical* can be used to find out what the physical offsets are
|
2014-04-02 08:29:32 +00:00
|
|
|
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
|
|
|
|
|
-----------
|
2014-05-19 15:49:35 +00:00
|
|
|
*btrfs-map-logical* will return 0 if no error happened.
|
2014-04-02 08:29:32 +00:00
|
|
|
If any problems happened, 1 will be returned.
|
|
|
|
|
|
|
|
|
|
AUTHOR
|
|
|
|
|
------
|
|
|
|
|
Written by Shilong Wang and Wenruo Qu.
|
|
|
|
|
|
|
|
|
|
COPYRIGHT
|
|
|
|
|
---------
|
|
|
|
|
Copyright (C) 2013 FUJITSU LIMITED.
|
|
|
|
|
|
|
|
|
|
License GPLv2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>.
|
|
|
|
|
|
|
|
|
|
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
|
|
|
|
|
|
|
|
|
|
SEE ALSO
|
|
|
|
|
--------
|
|
|
|
|
`mkfs.btrfs`(8)
|
