How to Fix: Synology Hyper Backup to external USB drive: Exception occurred while backing up data (Disk I/O error)
Synology Hyper Backup issue with external USB drive, Disk I/O error, and HFS+ format.
📋 Table of Contents
A Disk I/O error in Hyper Backup to an external USB drive can occur due to various reasons, including issues with the external drive's compatibility with Synology's NAS volume. This error is frustrating for users who rely on Hyper Backup for data backup and recovery. In this guide, we will walk you through the possible causes of this error and provide steps to troubleshoot and potentially fix it.
In some cases, a Disk I/O error may be caused by hardware issues with the external drive or NAS volume. However, in most cases, the issue is related to compatibility or configuration problems.
🛑 Root Causes of the Error
- The primary cause of a Disk I/O error in Hyper Backup to an external USB drive is a compatibility issue between the Synology NAS volume and the external drive's file system. In this case, the external drive was reformatted from exFAT to HFS+, which may not be compatible with the Synology NAS volume. This can cause issues with data transfer and lead to a Disk I/O error.
- Another possible cause of a Disk I/O error is a hardware issue with the external drive or NAS volume, such as a failing hard drive or a problem with the drive's firmware.
🔧 Proven Troubleshooting Steps
Check External Drive Compatibility
- Step 1: Step 1: Check if the external drive is compatible with Synology's NAS volume. Ensure that the file system of the external drive (HFS+) matches the file system used by the NAS volume ( SHR-2). You can check this by going to Disk Utility on your Mac and selecting the external drive. If it's not already set, change the file system to HFS+.
- Step 2: Step 2: Verify that the external drive is properly initialized and recognized by the NAS volume. Go to Synology's DSManager app and select the external drive. Ensure that it's properly connected and recognized by the NAS volume.
- Step 3: Step 3: Run a disk check on the external drive using Disk Utility or Western Digital's diagnostic tool to ensure there are no hardware issues.
Check NAS Volume Configuration
- Step 1: Step 1: Check if the NAS volume is set to use the correct file system. Go to Synology's DSManager app and select the NAS volume. Ensure that the file system used by the NAS volume matches the file system of the external drive (HFS+).
- Step 2: Step 2: Verify that the backup job is set correctly. Go to Synology's Disk Station Manager app and select the backup job. Ensure that the correct disk path and settings are selected.
🎯 Final Words
If you have checked for compatibility issues with the external drive and NAS volume, and verified that the file systems match, try running a diagnostic test on the external drive or NAS volume to rule out hardware issues. If none of these steps resolve the issue, consider contacting Synology support for further assistance.
❓ Frequently Asked Questions
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