The usual suggestion when installing ESX 4.x.x is to disconnect all SAN LUNs to avoid overwriting any shared VMFS volumes.
This can be an inconvenience, especially when installing ESX remotely in a remote site.
This document explains how to remove the emulex and qlogic HBA drivers that are usually loaded by the ESX 4.x.x ISO at install time.
VMware Certified Professionals, Sysadmins
See the attached pdf for content
Dinny Davies, VCP 3, VCP 4
You use this proven practice at your discretion. VMware and the author do not guarantee any results from the use of this proven practice. This proven practice is provided on an as-is basis and is for demonstration purposes only.