Why is MySQL Throwing an 'Error Writing File (Errcode 28)'?

MySQL File Writing Error (Errcode 28): Troubleshooting

When attempting to write a file using MySQL, you may encounter the error "Error writing file '' (Errcode: 28)." This issue signifies a problem with the file system rather than with MySQL itself.

Understanding Errcode 28

Errcode 28 specifically maps to the operating system error "No space left on device." This indicates that the file system where the file is being written to has run out of disk space.

Troubleshooting

To troubleshoot this error, follow these steps:

1. Check Disk Space: Use the command df -h to determine the available disk space on the server. If the disk space is nearly full, you will need to free up space.
2. Verify Directory Permissions: Ensure that the directory where the file is being written to has the appropriate permissions for MySQL. The user account running the MySQL process should have read-write permissions.
3. Use the 'perror' Command: Utilize the 'perror' command to clarify the specific operating system error associated with Errcode 28. Run the command perror 28 to obtain more information.
4. Increase Disk Space: If the disk space has run out, consider increasing the available storage space by adding a new disk or resizing existing partitions.

Conclusion

By following these troubleshooting steps, you can resolve the "Error writing file (Errcode 28)" issue and ensure that MySQL can successfully write files to the designated location.

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