The description regarding Direct SAN Access mode configuration can be found at Veeam Community Forum:
http://forums.veeam.com/viewtopic.php?f=21&t=9329#p39948
As far as I know, you can also ask any generic questions here.
Additionally, you might want to open a ticket with Veeam support team, since sometimes it’s rather hard to investigate technical issues through forum correspondence.
Thanks.