Lets start with the obvious. Does the md5 sum of your download match what is on CCO?
This might be bug CSCsd17267 where the sensor runs out of disk space to fully decrypt and decompress the update file. As a workaround to that, Log in to the sensor via the service account and remove the files in the following directory:
My guess is that the parentheses in the hostname are causing this failure. We are aware of the slash character in the hostname causing a similar issue. Remove the open and close parenthesis characters from your hostname and re-try the upgrade.
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...