# Troubleshooting problems with your Storage Gateway deployment
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Following, you can find information about best practices and troubleshooting issues related to gateways, host platforms, file shares, high availability, data recovery, and security. The on-premises gateway troubleshooting information covers gateways deployed on supported virtualization platforms. The troubleshooting information for high availability issues covers gateways running on VMware vSphere High Availability (HA) platform.

**Topics**
+ [Troubleshooting: gateway offline issues](troubleshooting-gateway-offline.md) - Learn how to diagnose problems that can cause your gateway to appear offline in the Storage Gateway console.
+ [Troubleshooting: Active Directory issues](troubleshooting-active-directory.md) - Learn what to do if you receive error messages such as `NETWORK_ERROR`, `TIMEOUT`, or `ACCESS_DENIED` when trying to join your File Gateway to a Microsoft Active Directory domain.
+ [Troubleshooting: gateway activation issues](troubleshooting-gateway-activation.md) - Learn what to do if you receive an internal error message when attempting to activate your Storage Gateway.
+ [Troubleshooting: on-premises gateway issues](troubleshooting-on-premises-gateway-issues.md) - Learn about typical issues that you might encounter working with your on-premises gateways, and how to allow Amazon Web Services Support to connect to your gateway to assist with troubleshooting.
+ [Troubleshooting: Microsoft Hyper-V setup issues](troubleshooting-hyperv-setup.md) - Learn about typical issues that you might encounter when deploying Storage Gateway on the Microsoft Hyper-V platform.
+ [Troubleshooting: Amazon EC2 gateway issues](troubleshooting-EC2-gateway-issues.md) - Find information about typical issues that you might encounter when working with gateways deployed on Amazon EC2.
+ [Troubleshooting: hardware appliance issues](troubleshooting-hardware-appliance-issues.md) - Learn how to resolve issues that you might encounter with the Amazon Storage Gateway Hardware Appliance.
+ [Troubleshooting: File Gateway issues](troubleshooting-file-gateway-issues.md) - Find information that can help you understand the cause of errors and health notifications that appear in your File Gateway's CloudWatch logs.
+ [Troubleshooting: file share issues](troubleshooting-file-share-issues.md) - Learn about actions you can take if you experience unexpected issues with your file share.
+ [Troubleshooting: high availability issues](troubleshooting-ha-issues.md) - Learn what to do if you experience issues with gateways that are deployed in a VMware HA environment.

## High Availability Health Notifications
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When running your gateway on the VMware vSphere High Availability (HA) platform, you may receive health notifications. For more information about health notifications, see [Troubleshooting: high availability issues](troubleshooting-ha-issues.md).