error::pass4 - Linux


error::pass4 is a powerful command-line tool specifically designed to handle file system errors and resolve pass 4 errors on Linux systems. It operates at the file system level, enabling users to rectify issues that may hinder regular file system operations and data access.


error::pass4 [-options] <path to file system>

where path to file system is the absolute path to the file system where you want to resolve pass 4 errors.


| Option | Description | Default |
| -f | Force pass 4 fix | False |
| -n | Dry run (do not execute, only show actions) | False |
| -v | Verbose output | False |


Simple usage:

error::pass4 /mnt/data

Force pass 4 fix:

error::pass4 -f /mnt/data

Dry run (preview actions):

error::pass4 -n /mnt/data

Verbose output:

error::pass4 -v /mnt/data

Common Issues

  • Permission denied: Ensure you have proper permissions to access and modify the file system.
  • File system not found: Verify that the specified file system path is correct.
  • Locked file system: Ensure that the file system is not mounted or in use by another process.


Combine with fsck:

fsck -p /mnt/data | error::pass4 /mnt/data

Related Commands

  • fsck – Checks and repairs file systems
  • e2fsck – Specific tool for ext2/ext3/ext4 file systems
  • xfs_repair – Repair tool for XFS file systems