man > e2scrub(8)

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📝 NAME

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

🚀 Quick Reference

Use Case	Command	Description
🔍 Check file system on LVM logical volume	e2scrub /dev/vg/lv	Snapshot the LV and run metadata integrity check on the snapshot
📋 Dry-run (show what would be done)	e2scrub -n /dev/vg/lv	Print commands that would be executed without actually running them
🧹 Check and trim if no errors found	e2scrub -t /dev/vg/lv	Run fstrim automatically after a clean check
🗑️ Remove a leftover snapshot	e2scrub -r /dev/vg/lv	Remove the .e2scrub snapshot and exit immediately
ℹ️ Show version	e2scrub -V	Print version information and exit

📋 SYNOPSIS

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 256 MiB 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 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).

🔗 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>

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E2fsprogs version 1.46.5 — December 2021

📝 NAME 🚀 Quick Reference 📋 SYNOPSIS 📖 DESCRIPTION ⚙️ OPTIONS EXIT CODE 🔗 SEE ALSO 👤 AUTHOR ©️ COPYRIGHT