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.
History
- Arch Linux 2026-11-01: the text shown here
- Debian 13 (Trixie)
- Debian 12 (Bookworm)
- Debian 11 (Bullseye)
- Debian 10 (Buster)
- Debian 9 (Stretch)
- Debian 8 (Jessie)