Synology NAS Error Code 43: How to Fix It

Q: What does Synology error 43 mean?

Error 43 indicates that an external storage device connected via USB or eSATA was disconnected unexpectedly. This can be due to loose cables, power issues, or a failing drive.

Q: Can error 43 cause data loss?

The error itself doesn't cause data loss, but unexpected disconnections can lead to file system corruption. Always safely eject drives to minimize risk.

Q: How do I safely eject an external drive on Synology?

Go to Control Panel > External Devices, select the drive, and click the eject button. Wait for the notification that it's safe to remove.

Q: Is error 43 serious?

It's moderate. It often resolves with a simple reconnect or cable replacement, but persistent errors may indicate a failing drive or hardware issue.

Q: Will reformatting the external drive fix error 43?

Formating should be a last resort as it erases data. Only do this after backing up files, if file system checks fail.

Abstract

Error 43 on Synology DSM indicates that an external USB or eSATA drive was disconnected unexpectedly. This can happen due to loose connections, power issues, or drive errors. Follow these steps to safely reconnect and prevent data loss.