Installation Guide Prerequisites for the Upgrade 3
• Always upgrade HA CPUs in pairs, immediately before or after the Primary CPU.
• The order in which systems are upgraded can be used to minimize these disruptions.
Welch Allyn recommends installing the software upgrade and rebooting systems in
the following order.
• System acting as an SQL server
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.
• HA Pairs of CPUs.
• Other Primary systems.
• Auto Open Secondary systems.
• Patient List Review system.
• No additional considerations need to be taken for a WACS (Welch Allyn Connectivity
Server) connected to the network.
• While the System acting as an SQL server is being upgraded, Deleted Arrhythmia
events may not display properly on all networked systems.
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Contact Welch Allyn Technical Support if you are unsure which system is an SQL Server.
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