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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXIT STATUS | SEE ALSO | COLOPHON |
BTRFS-MAP-LOGICAL(8) Btrfs Manual BTRFS-MAP-LOGICAL(8)
btrfs-map-logical - map btrfs logical extent to physical extent
btrfs-map-logical <options> <device>
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.
-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.
btrfs-map-logical will return 0 if no error happened. If any problems
happened, 1 will be returned.
mkfs.btrfs(8)
This page is part of the btrfs-progs (btrfs filesystem tools)
project. Information about the project can be found at
⟨https://btrfs.wiki.kernel.org/index.php/Btrfs_source_repositories⟩.
If you have a bug report for this manual page, see
⟨https://btrfs.wiki.kernel.org/index.php/Problem_FAQ#How_do_I_report_bugs_and_issues.3F⟩.
This page was obtained from the project's upstream Git repository
⟨git://git.kernel.org/pub/scm/linux/kernel/git/kdave/btrfs-progs.git⟩
on 2017-07-05. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-to-
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the information in this COLOPHON (which is not part of the original
manual page), send a mail to man-pages@man7.org
Btrfs v4.6.1 07/16/2016 BTRFS-MAP-LOGICAL(8)