I once had to upgrade a Cisco UCS Manager and the process went very smoothly, without any downtime and I documented all the procedures.
For those who do not know this system here is a brief description:
Cisco UCS Manager supports the entire Cisco UCS server and Cisco HyperFlex Series hyperconverged infrastructure portfolios. It enables server, fabric, and storage provisioning as well as, device discovery, inventory, configuration, diagnostics, monitoring, fault detection, auditing, and statistics collection. You can extend the benefits of Cisco UCS Manager globally across an enterprise to thousands of servers in multiple domains with Cisco UCS Central Software.
More information:
In this post I will show you how to Upgrade UCS 2.2(3c) to version 2.2(8f), but it also applies to other versions. I'm going to show you how to Upgrade the infrastructure (UCS) software, Fabric Interconnects and I/O modules firmware in a two-stage operation.
So, let's start!