---
name: "fsck.gfs"
section: "8"
platform: "linux"
package: "gfs-tools"
version: "3.0.12-3.2+deb7u2"
release: "Debian 7 (Wheezy)"
platforms: ["linux"]
url: "https://new.carta.tech/fsck.gfs"
---

# fsck.gfs(8)

Offline GFS file system checker

## NAME

fsck.gfs - Offline GFS file system checker

## SYNOPSIS

**fsck.gfs** \[*OPTION*\]... *DEVICE*

## WARNING

All GFS nodes *must* have the GFS filesystem unmounted before running fsck.gfs.  Failure to unmount all nodes may result in filesystem corruption.

## DESCRIPTION

fsck.gfs will check that the GFS file system on a device is structurally valid. It should not be run on a mounted file system.  If file system corruption is detected, it will attempt to repair the file system.  There is a limit to what fsck.gfs can do.  If important file system structures are destroyed, such that the checker can not determine what the repairs should be, reparations could fail.

GFS is a journaled file system, and as such should be able to repair damages to the file system on its own.  However, faulty hardware has the ability to write incomplete blocks to a file system thereby causing corruption that GFS can not fix.  The first step to ensuring a healthy file system is the selection of reliable hardware (i.e. storage systems that will write complete blocks - even in the event of power failure).

## OPTIONS

- **-h**

  Help.

  This prints out the proper command line usage syntax.

- **-q**

  Quiet.

- **-n**

  No to all questions.

  By specifying this option, fsck.gfs will only show the changes that would be made, not make any changes to the filesystem.

- **-V**

  Version.

  Print out the current version name.

- **-v**

  Verbose operation.

  Print more information while running.

- **-y**

  Yes to all questions.

  By specifying this option, fsck.gfs will not prompt before making changes.