performance for the backupexec 11d

Hi All,

           I have HP MSL 2024 tape and install backupexec 11d , backup 1.5TB file at least 22hours backup , if backup local server no network the speed is 1800MB/min , backup network driver about 800-900 MB/min ? i don't understand why so poor the backup performance ? is setting problem or this driver or other problem ???

 

Server : Win2003 R2 SP1

Backup : HP MSL 2024

Software : Veritas Backupexec 11d r6235

Thanks,