Symantec backup issues

Team; I recently replaced an HP G5 with a Dell R610.  I am using a DELL LTO4 tape drive.
My HP server was running Backup Exec 2012 with my tape backup running at an average of 3500 to tape.  WONDERFUL!

I moved the SAS 5/E card and the tape drive from the HP and installed them in the Dell R610 which is running Backup Exec 2012 (as I removed the HP) and now the performance is 1050 to tape.  If I backup the server to DISK the performance is 3500

I checked the tape drive drivers and they are the Symantec drivers and unknown media changer.  All the firmware appears up to date on the DELL as far as I can tell

How can I troubleshoot this issue?
MainSail2007Asked:
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MainSail2007Connect With a Mentor Author Commented:
I found the problem to be the NIC driver on the new host computer.  I went to the latest version and the problem was fixed
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MutogiIT ManagerCommented:
does this happen to all tapes?

Have you tried a brand new one?
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Robert SaylorSenior DeveloperCommented:
check firmware and drivers on the SAS adapter. Drivers for tape is managed by Symantec and you won't load the medium changer driver unless you are using NTBackup.

Speaking of NTBackup want to give that a try?
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MainSail2007Author Commented:
This happens to all tapes.  It was working perfectly yesterday on the HP equipment so I know it is not the tape drive or the tape card as that was just move from the HP to the Dell today
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MainSail2007Author Commented:
Hello the SAS adapter info is below:
 
Firmware Version 00.10.51.00.06.12.05.00
Driver Version 1.34.03.00
Storport Driver Version 6.1.7601.17577

Unfortunately I am backing up a VMWARE farm
Testing a vmware server to disk is great performance but to tape the performance suffers
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MainSail2007Author Commented:
The NIC Driver was the problem
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MainSail2007Author Commented:
driver  was the problem
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