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 lvname.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 system.  (Note: the commands will  not
              actually  be  executed;  however,  since e2scrub needs to run some commands to query the system 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 ©2018 Oracle.  License is GPLv2+. <http://www.gnu.org/licenses/gpl-2.0.html>

E2fsprogs version 1.45.5                          January 2020                                        E2SCRUB(8)