E2SCRUB(8)                (August 2021)                E2SCRUB(8)

     NAME
          e2scrub - check the contents of a mounted ext[234] file
          system

     SYNOPSYS
          e2scrub [OPTION] MOUNTPOINT | DEVICE

     DESCRIPTION
          e2scrub attempts to check (but not repair) all metadata in a
          mounted ext[234] file system if the file system 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 sys-
          tem will be marked as having errors.  The file system should
          be taken offline and e2fsck run as soon as possible, because
          e2scrub does not fix corruptions.  If the file system 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 com-
               mands 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 file system 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)

     Page 1              E2fsprogs version 1.46.4    (printed 5/24/22)

     E2SCRUB(8)                (August 2021)                E2SCRUB(8)

     AUTHOR
          Darrick J. Wong <darrick.wong@oracle.com>

     COPYRIGHT
          Copyright [co]2018 Oracle.  License is GPLv2+.
          <http://www.gnu.org/licenses/gpl-2.0.html>

     Page 2              E2fsprogs version 1.46.4    (printed 5/24/22)