E2SCRUB(8) System Manager's Manual E2SCRUB(8)
NAME
e2scrub - check the contents of a mounted ext[234] filesystem
SYNOPSYS
e2scrub [OPTION] MOUNTPOINT | DEVICE
DESCRIPTION
e2scrub attempts to check (but not repair) all metadata in a mounted
ext[234] filesystem if the filesystem resides on an LVM logical volume.
The block device of the LVM logical volume can also be passed in.
This program snapshots the volume and runs a file system check on the
snapshot to look for corruption errors. The LVM volume group must have
at least 256MiB of unallocated space to dedicate to the snapshot or the
logical volume will be skipped. The snapshot will be named lv-
name.e2scrub and udev will not create symbolic links to it under
/dev/disk. Every attempt will be made to remove the snapshots prior to
running e2scrub, but in a dire situation it may be necessary to remove
the snapshot manually.
If no errors are found, fstrim can be called on the file system if it
is mounted. If errors are found, the file system will be marked as
having errors. The filesystem should be taken offline and e2fsck run
as soon as possible, because e2scrub does not fix corruptions. If the
filesystem is not repaired, e2fsck will be run before the next mount.
OPTIONS
-n Print what commands e2scrub would execute to check the file sys-
tem. (Note: the commands will not actually be executed; how-
ever, since e2scrub needs to run some commands to query the sys-
tem to determine what commands would be executed, it still needs
to be run as root.)
-r Remove the e2scrub snapshot and exit without checking anything.
-t Run fstrim(1) on the mounted filesystem if no errors are found.
-V Print version information and exit.
EXIT CODE
The exit codes are the same as in e2fsck(8)
SEE ALSO
e2fsck(8)
AUTHOR
Darrick J. Wong <darrick.wong@oracle.com>
COPYRIGHT
Copyright (C)2018 Oracle. License is GPLv2+. <http://www.gnu.org/li-
censes/gpl-2.0.html>
E2fsprogs version 1.45.6 March 2020 E2SCRUB(8)