Something to know about if you are moving to ESXi 5 and using iSCSI

http://blogs.vmware.com/kb/2011/10/slow-esxi-5x-boot-times-when-using-software-iscsi.html?utm_source=feedburner&utm_medium=email&utm_campaign=Feed%3A+VmwareKnowledgebaseBlog+%28Support+Insider%29