Dell Poweredge R710 Vmware Stand-by Mode slow to boot back up

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http://serverfault.com – I currently have Vmware ESXI 5 cluster with Dell Poweredge R710 hosts. I was told that its possible when a host goes into stand-by to have a "quick-boot" when it comes out. At this time I am waiting 7+ minutes. I have seen another cluster that boots out of stand-by in 30 seconds. Is this a setting or part of IPMI or bios? If so how do i set this up? (HowTos)