Not sure I understand what you are asking for
The BackupExec media server can only be on a Windows machine.
The standard TrialWare download should include the RALUS (RemoteAgent for Linux and Unix Systems)
TrialWare is here http://www.symantec.com/business/products/downloads/index.jsp after you expand "storage"
How can i download the veritas software for sun solaris x86 servers and how to configure the root disk mirroring..
Veritas Volume Manager is now part of Storage Foundation. It is a different product from BE. Its forum is part of the Storage and Clustering community. Perhaps you should post your queries at that forum.
and select "Trialware"
If you decide that this fills your needs, you can then purchase and install the serials to make the software production, without having to uninstall/reinstall