Solaris 8, 9 and 10 for SPARC are supported for NetBackup as a Client or Server. They are also supported for NetBackup Bare Metal Restore (BMR) NetBackup Operations Manager (NOM).
Solaris x86 is supported with NetBackup 6.5, which was released in August of 2007, as a Server or Client. That means that the Sun Fire x4600 server (Thumper) can be used as a Media Server for Symantec Veritas NetBackup.
In this diagram, the Netbackup master Server(s) use the x4500, the Media Server, as the primary cache for staging operations. The tape library can be attached directly to the 4500 (SCSI or FC) or the library can be connected to another media server.
Utilizing all four of the built in Gigabit ethernet ports and ZFS, it's possible to deliver close to 350 MB/Sec. of backup throughput.