Updatemanager upgrade baseline

Hello,

I have always had concerns with upgrading ESXi from say vSphere 4 to vSphere 5 and storage connectivity. My main concern by leaving the production LUNs connected while doing the upgrade on a host is that something might happen to the LUNs during the upgrade process.

What do you guys usually do? I often disable ports on FC switches.

Thanks.
synackrstAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Remove FC cables or Disable FC ports, just in case of accident, it does happen!
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synackrstAuthor Commented:
Thanks hanccocka. I will continue doing that, eventhough an upgrade will take longer that way its always good to be safe.
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Mohammed KhawajaManager - Infrastructure:  Information TechnologyCommented:
I ensure all VMs are shut and perform my upgrade.  Never had any issues.
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