ACS might not use all that spaces but it does create partitions and needs to book that space.
You could maybe get away with the vmware option to "declare 500gig but only allocate them as they are being used" but I cannot confirm this as I didn't try. In any case, ACS needs to see it has 500Gigs.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...