e2scrub

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 1.45.5         January 2020                       E2SCRUB(8)