I find the link has a mistake.http://www.symantec.com/theme.jsp?themeid=backupexec-deduplication#
Please tell relevant departments modify it as soon as possible.
Please Click “Improving Deduplication Performance in Physical and Virtual Environments with Symantec Backup Exec 2012 R3” to see it.
Open it,find content is “Improving Deduplication Performance in Physical and Virtual Environments with Symantec Backup Exec 2010 R3”
Jason