I THINK... if you can run Storage Foundation on it, you should be able to use RealTime with it. I think.
(DISCLAIMER: I know very little about Storage Foundation - or RealTime, for that matter)
Check out pages 8-9 of the RT 7.0 Release Notes and see if you read it the same way I do:
Symantec NetBackup RealTime Release Notes - 7.0
http://support.veritas.com/docs/339934
Here's the SF 5.0 MP3 HCL for Solaris (and others):
Hardware Compatibility List for Veritas Storage Foundation (tm) and High Availability Solutions 5.0 Maintenance Pack 1, 5.0 Maintenance Pack 2 (including SFCFS for Oracle RAC for RHEL, SLES and OEL), 5.0 Maintenance Pack 3, 5.0 Maintenance Pack 4, and 5.0.1
http://support.veritas.com/docs/283161
Finally, here's the Snapshot Client CL for NetBackup 7.0 (you need to be able to use SNC to run RT):
NetBackup (tm) 7 Snapshot Client Compatibility (Updated April 26 2010)
http://support.veritas.com/docs/340298
See pages 423-425 or 1489-1492.
Good luck!