e2scrub(8) - phpMan

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 situ-
ation 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 er-
rors 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 corrup-
tions. 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
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)