What causes Error 9722?

Quorum lost due to node failure. Storage paths disconnected. Cluster service dependency failure. Disk space or IOPS bottleneck

How do I fix Error 9722 (DNS_ERROR_ALIAS_LOOP)?

Check Cluster Health: Open PowerShell as Administrator. Run: Get-ClusterNode to check node status. Run: Test-Cluster for full validation. Review the HTML report for issues

Fix DNS_ERROR_ALIAS_LOOP — Windows Error Code 9722

Q: What is Windows Error 9722 (DNS_ERROR_ALIAS_LOOP)?

Error 9722 (DNS_ERROR_ALIAS_LOOP) is a Windows Cluster & Storage error that occurs when an alias loop has been detected with either cname or dname records.. This guide provides step-by-step solutions to resolve this issue.

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⚡ Quick Fix

Check Cluster Health: Open PowerShell as Administrator

👇 See all 1 solutions below

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📑 Table of Contents

What is Error 9722? Common Causes Step-by-Step Solutions Prevention Tips Related Errors

💡 What is Error 9722?

Windows System Error Code 9722, known as DNS_ERROR_ALIAS_LOOP, is a Cluster & Storage error that occurs during cluster, backup, and storage management. The error indicates that: An alias loop has been detected with either CNAME or DNAME records. When this error is encountered, the Windows operating system was unable to complete the requested operation within the storage/cluster services subsystem. The error code 9722 is returned by the GetLastError() function and provides developers with a specific identifier to diagnose the root cause of the failure. The symbolic name DNS_ERROR_ALIAS_LOOP maps directly to this numeric code and is commonly referenced in Microsoft documentation, developer forums, and system logs. Understanding this error and its context within cluster, backup, and storage management is essential for effective troubleshooting.

⚠️ Common Causes

Quorum lost due to node failure
Storage paths disconnected
Cluster service dependency failure
Disk space or IOPS bottleneck

✅ Step-by-Step Solutions

1 Check Cluster Health

Open PowerShell as Administrator
Run: Get-ClusterNode to check node status
Run: Test-Cluster for full validation
Review the HTML report for issues

🎬 Video Tutorials

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How To Fix Dns Server Not Responding Windows 10 11

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💻 Diagnostic Command

Run this PowerShell command to find related events in your system log:

Get-EventLog -LogName System -Newest 20 | Where-Object {$_.Message -like "*9722*" -or $_.Message -like "*DNS_ERROR_ALIAS_LOOP*"} | Format-List

💡 Open PowerShell as Administrator, paste the command above, and press Enter.

🛡️ Prevention Tips

Configure redundant storage paths (MPIO)
Validate cluster after updates
Monitor disk latency and capacity

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Last updated: 2026-03-13

📖

Based on Official Microsoft Documentation

Solutions Tested on Windows 10 & 11

Error codes sourced from Microsoft Win32 SDK. Updated 2026-03-13.