phpman > man > e2scrub(8)

E2SCRUB(8)                             System Manager's Manual                            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 system 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 com‐
              mands 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 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)

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

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



E2fsprogs version 1.46.5                    December 2021                                 E2SCRUB(8)