For hosts with RDM disks, please set the RDM disk parameter “ IsPerenniallyReserved” to true before the patching.
http://pingforinfo.com/powercli-script-to-set-perennial-reservation-to-all-rdm-luns-in-a-cluster/
Three useful website for VMware patch version.
https://esxi-patches.v-front.de/ESXi-5.5.0.html
https://my.vmware.com/cn/group/vmware/patch#search
Create a Baseline for the Patch
原文：http://549687.blog.51cto.com/539687/1926954