Dell Wyse ThinOS Version 9.1.3129, 9.1.3112, 9.1.2101, and 9.1.1131 Migration Guide

Prerequisites before you migrate from ThinOS 8.6 or upgrade to ThinOS 9.x

• If you are using ThinOS 8.6, you must upgrade to ThinOS 8.6_807 and apply the latest BIOS updates before upgrading to ThinOS 9.1.3129.
• If you are using earlier versions of ThinOS 9.0, you must upgrade to ThinOS 9.0.4024 before upgrading to ThinOS 9.1.3129.
• You must back up your device settings before you start the upgrade process to ThinOS 9.x. Once upgraded to ThinOS 9.1, you can downgrade to ThinOS 8.6 only by using the Merlin image.
• Before migrating from ThinOS 8.x to ThinOS 9.x or upgrading from ThinOS 9.x to later versions, ensure that your system is powered on and the sleep mode is disabled on the system. If the system has entered the sleep mode, you must send the Wakeup On LAN command through Wyse Management Suite before using any real-time commands. To use the Wakeup On LAN command, ensure that the Wake-On-LAN option is enabled in BIOS.
• Ensure that you upgrade the BIOS version, on Wyse 5070 Thin Clients, to 1.3.1 before upgrading to ThinOS 9.1. If you upgrade to ThinOS 9.1 with an earlier BIOS version and then upgrade the BIOS version to 1.3.1 or later, the thin client may fail to boot.