Use the Stage wizard to download the patches before using remediation. This downloads and prepares the patches while the host is still online. This decrease the amount of time the host is off line (in maintenance mode) will applying patches.

Stage and Remediate in Upate Manager

You can stage at the cluster and Data Center level to prepare all hosts in the cluster for remediation.

Update Manager Stage Wizard

Shortcuts in Home-Inventory-Hosts and Clusters

Stage and Remediate Host - Cluster and Data Center

Just updated to ESX 4.0.0 build 175625. Staging took about 3 1/2 minutes total and remediation took about 12 minutes per host (this include Entering maintenance mode, VM migration, patch installation, reboot, exit maintenance mode). Three and a half minutes of savings may not seem like much, and across three hosts it really isn’t that big of a deal, but across 20 hosts that would make a huge difference.

Awesome new vSphere feature!