btrfs-map-logical8
Map btrfs logical extent to physical extent
Usage
btrfs-map-logical <options>
<device>
Overview
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.
Releases
7 releases since Debian 8 (Jessie); the text changed 6 times.