Why SAN speed is too much slow
My Netbackup server is connected to the File server via LAN. My same Netbackup server is connected to the SAN Switch via Fiber. The File server is also connected to the SAN Switch via Fiber. SAN Switch is connected to one Robot Library having shared tape drive. I have done the necessary zonning required on the SAN Switch to take the traffice on the SAN. I am able to take the backup of the File Server through SAN using Media Server. I have done all the necessary tunning & buffering in order to increase the speed, it has increased the speed but not adequate.
The speed for my backups is 10 MB/S. I have checked even the performance graph on the SAN Switch. At port number 3 SAN Switch is receiving nearly 55 MB/S but suddenly it's speed lowers down at nearly 10 MB/S and start transmitting at the same speed to tape library. At other end the end from the port 5 of the SAN Switch to the Tape Libraray the speed again becomes fast.
Is it possibe that the SAN Switch is not properly configured. Because I have done everything in order to increase the speed from the Netbackup end. I even have checked the console of the tape library but to no avail. Can any body guide me what are the necessary actions i can take in order to get the desired result for the SAN.
Waiting for Quick responses.