---
title: "Storage System Input-Output Time-out | Microsoft Docs"
ms.custom: ""
ms.date: "03/01/2017"
ms.prod: sql
ms.prod_service: "database-engine"
ms.reviewer: ""
ms.technology: security
ms.topic: conceptual
helpviewer_keywords: 
  - "Best Practices [Database Engine]"
ms.assetid: ff921952-b935-4bb0-b587-bba6cd15a090
author: VanMSFT
ms.author: vanto
---
# Storage System Input-Output Time-out
[!INCLUDE[appliesto-ss-xxxx-xxxx-xxx-md](../../includes/appliesto-ss-xxxx-xxxx-xxx-md.md)]
  This rule checks the system event log for EventId 9. This message indicates that an I/O time-out has occurred in the storage system.  
  
## Best Practices Recommendations  
 Review the following Microsoft Knowledge Base articles for more information about how to troubleshoot this error:  
  
-   [Microsoft Knowledge Base article 259237](https://go.microsoft.com/fwlink/?linkid=117746)  
  
-   [Microsoft Knowledge Base article 154690](https://go.microsoft.com/fwlink/?LinkId=117747)  
  
## For More Information  
 [SQL Server I/O Basics, Chapter 2](/previous-versions/sql/sql-server-2005/administrator/cc917726(v=technet.10))