AB#8618: Data corruption and storage replication failures in Windows Server 2025

New article for [CI 8618](https://dev.azure.com/KMOps/ContentExperience/_queries/edit/8618)

Author: v-tappelgate

support/windows-server/backup-and-storage/troubleshoot-data-corruption-storage-replication-failures-ws2025.md

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+---
+title: Troubleshoot data corruption and storage replication failures in Windows Server 2025
+description: discusses how to identify, troubleshoot, and resolve issues that relate to data corruption, disk errors, and storage replication failures in Windows Server 2025.
+ms.date: 12/19/2025
+author: kaushika-msft
+ms.author: kaushika
+manager: dcscontentpm
+audience: itpro
+ms.topic: troubleshooting
+ms.reviewer: kaushika, simonw
+ai.usage: ai-assisted
+ms.custom:
+- sap:backup,recovery,disk,and storage\data corruption and disk errors
+- pcy:WinComm Storage High Avail
+appliesto:
+  - <a href=https://learn.microsoft.com/windows/release-health/windows-server-release-info target=_blank>Supported versions of Windows Server</a>
+---
+# Troubleshoot data corruption and storage replication failures in Windows Server 2025
+
+This article discusses how to identify, troubleshoot, and resolve issues that relate to data corruption, disk errors, and storage replication failures in Windows Server 2025. These issues can affect storage performance, data integrity, and replication reliability in your environment.
+
+## Symptoms
+
+You might experience one or more of the following symptoms on Windows Server 2025:
+
+- The event logs list disk, storage, and replication-related errors. These errors might include the following events:
+  - Event ID 7 (device error)
+  - Event ID 11 (controller error)
+  - Event ID 153 (disk timeout)
+  - Event ID 1112 (Storage Replica replication error)
+
+- Files, databases, or application storage appear to be corrupt.
+- Storage Replica experiences replication failures.
+- Storage monitoring tools generate warnings or alerts that indicate degraded performance or reliability.
+
+## Cause
+
+The following factors can cause these issues:
+
+- Physical disk failures, such as bad sectors or mechanical defects.
+- Data corruption within the storage subsystem.
+- Underlying storage hardware issues that interfere with replication processes.
+- Misconfigured storage replication settings, such as inadequate log sizes or incorrect replication mode.
+- Disk configuration issues that reduce system resilience.
+
+## Resolution
+
+> [!IMPORTANT]  
+> Before you start troubleshooting storage issues, make sure that you have current backups of all critical data.
+
+To resolve data corruption and storage replication failures in Windows Server 2025, follow these steps.
+
+1. To inspect hardware for failing disks, open a Windows PowerShell command prompt and then run the following cmdlets:
+
+   ```powershell
+   Get-PhysicalDisk | Format-Table -AutoSize
+   Get-PhysicalDisk | Get-StorageReliabilityCounter
+   ```
+
+   If a disk or controller is defective, replace it promptly to prevent further corruption or replication errors.
+
+1. Make sure that all storage arrays, RAID configurations, and storage area networks (SANs) or network attached storage (NAS) devices are functioning correctly, and verify their performance.
+
+1. Make sure that firmware is up to date on all storage controllers.
+
+1. To fix bad disk sectors and recover as much data as possible, open a Windows Command Prompt window and then run the following command:
+
+   ```console
+   chkdsk <Drive>: /F /R
+   ```
+
+   > [!NOTE]  
+   > In this command, \<Drive> represents the drive to be fixed.
+
+1. If `chkdsk` couldn't recover some of the data, restore that data from your backup.
+
+1. Review your disk and Storage Replica configuration, and make sure your system follows best practices. Pay particular attention to the following settings:
+
+   - Allocate sufficient space for log files (production workloads should have at least 8 GB available for log files).
+   - Allocate sufficient network bandwidth for replication traffic.
+   - Confirm the volume alignment and cluster size settings.
+   - Validate that the replication mode (synchronous or asynchronous) matches your requirements.
+   - Make sure that all replication nodes are running Windows Server Datacenter edition.
+
+1. To confirm that you've restored data consistency and transfer reliability, test storage replication. At a PowerShell command prompt, run the following cmdlets:
+
+   ```powershell
+   Get-SRGroup | Format-List *
+   Get-SRPartnership | Format-List *
+   Test-SRTopology -SourceComputerName Server1 -SourceVolumeName D: -DestinationComputerName Server2 -DestinationVolumeName D:
+   ```
+
+1. To confirm that your system is stable, monitor the replication status for at least 24 hours.
+
+1. For additional troubleshooting information, including specialized troubleshooting for Event ID 153, see [Data corruption and disk errors troubleshooting guidance](troubleshoot-data-corruption-and-disk-errors.md).
+
+1. If issues persist, consider contacting Microsoft Support. For information about helpful information to add to your support request, review [Data collection](#data-collection).
+
+## Data collection
+
+Before you contact Microsoft Support for assistance, gather the following information from your Windows Server 2025 environment:
+
+- Event Viewer logs for disk, storage, and replication errors (System, Application, and Microsoft-Windows-StorageReplica/Admin logs).
+- Output from PowerShell cmdlets such as the following cmdlets:
+
+  ```powershell
+  Get-PhysicalDisk | Format-Table -AutoSize
+  Get-SRGroup
+  Get-SRPartnership
+  Get-EventLog -LogName System -Newest 100 | Where-Object {$_.Source -like "*disk*" -or $_.Source -like "*storage*"}
+  ```
+
+- Details of your storage configuration, including RAID levels, disk models, firmware versions, and storage controller information.
+- Screenshots or exports from monitoring tools showing error codes and performance metrics.
+- Steps you have already taken to troubleshoot the issue.
+
+## References
+
+- [Check disk for errors in Windows Server](/windows-server/administration/windows-commands/chkdsk)
+- [Storage Replica overview in Windows Server](/windows-server/storage/storage-replica/storage-replica-overview)
+- [Troubleshoot Storage Spaces issues](/windows-server/storage/storage-spaces/troubleshooting-storage-spaces)
+- [Storage Replica known issues](/windows-server/storage/storage-replica/storage-replica-known-issues)
+- [Data corruption and disk errors troubleshooting guidance](troubleshoot-data-corruption-and-disk-errors.md)