The “barrier-based sync failed” error message in JBD (Journaling Block Device) can occur when the file system encounters an issue with writing data to disk. Barriers are used to ensure that data is written to disk in the correct order and to prevent data loss in the event of a system crash. When a barrier-based sync fails, it means that the disk system is unable to write the data in the correct order, leading to potential data corruption.
To resolve this issue, you should try the following steps:
- Check the disk for errors: Run a disk check on the affected disk to ensure that it is healthy and free of errors.
- Check the file system for errors: Run a file system check on the affected file system to ensure that it is healthy and free of errors.
- Disable barriers: If the disk and file system checks are successful, you can try disabling barriers in the JBD configuration. To do this, add the following line to the
/etc/fstabfile for the affected partition:mount -o barrier=0
This will disable barriers for that partition, and the file system should mount without any errors.
- Update the disk firmware: If the issue persists, you may need to update the firmware on your disk system to the latest version. Contact the manufacturer for instructions on how to do this.
- Replace the disk: If none of the above steps resolve the issue, you may need to replace the affected disk with a new one.
It is important to resolve this issue as soon as possible, as it can lead to data corruption and loss. If you are unable to resolve the issue, it is recommended to seek assistance from a professional administrator.