Hi Eli
am also faced the same issue here,
Server info:
OS : Windows 2008
Snapdrive 6
Snap manager 5
Error : RPC server not available check Dcom ports or Windows firewall while connecting disk in snap drive,
am using 2 servers in cluster mode, act as exchange server. in primary server am getting above error, because of that am not able to take backup & verify in snap manager.
note : firewall service is stop only, not disabled.
Pls help me to sort out of this issue,