mirror of
https://github.com/kdave/btrfs-progs
synced 2024-12-25 15:42:23 +00:00
a4197dfe24
Italic format is used for parameters and values. also this makes the text visually separated, Signed-off-by: David Sterba <dsterba@suse.cz>
58 lines
1.5 KiB
Plaintext
58 lines
1.5 KiB
Plaintext
btrfs-zero-log(8)
|
|
=================
|
|
|
|
NAME
|
|
----
|
|
btrfs-zero-log - clear out log tree
|
|
|
|
SYNOPSIS
|
|
--------
|
|
*btrfs-zero-log* <dev>
|
|
|
|
DESCRIPTION
|
|
-----------
|
|
*btrfs-zero-log* will remove the log tree if log tree is corrupt, which will
|
|
allow you to mount the filesystem again.
|
|
|
|
The common case where this happens has been fixed a long time ago,
|
|
so it is unlikely that you will see this particular problem.
|
|
|
|
One can determine whether *btrfs-zero-log* is needed according to the kernel
|
|
backtrace:
|
|
----
|
|
? replay_one_dir_item+0xb5/0xb5 [btrfs]
|
|
? walk_log_tree+0x9c/0x19d [btrfs]
|
|
? btrfs_read_fs_root_no_radix+0x169/0x1a1 [btrfs]
|
|
? btrfs_recover_log_trees+0x195/0x29c [btrfs]
|
|
? replay_one_dir_item+0xb5/0xb5 [btrfs]
|
|
? btree_read_extent_buffer_pages+0x76/0xbc [btrfs]
|
|
? open_ctree+0xff6/0x132c [btrfs]
|
|
----
|
|
|
|
If the errors are like above, then *btrfs-zero-log* should be used to clear
|
|
the log and the filesystem may be mounted normally again.
|
|
|
|
NOTE: If you use btrfs as the root filesystem, you may want to include
|
|
*btrfs-zero-log* into initramdisk if the log problems hits you often.
|
|
|
|
EXIT STATUS
|
|
-----------
|
|
*btrfs-zero-log* will return 0 if no error happened.
|
|
Other exit code means some problems happened.
|
|
|
|
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)
|