We currently upgraded from backup exec 11d to backup exec 12.5 sp3. Applied all patches updates, etc and pushed out the latest remote backup agent to all servers being backed up,

another words, we thought everything was the same except the version, same backup jobs, same files to be backed up, but...

we noticed a signaficantly reduced backup speed to tape to complete the 2 night jobs we run.  My HP LTO2 drive was getting 750-800 mb/min and my HP LTO3 drive was getting 1100-1150 mb/min

for their respective jobs. After the upgrade, my LTO2 is getting 550-575 mb/min and my LTO3 is getting 850-875 mb/min.??

I saw a similar post about upgrading the drivers for the tape drives to symantec drivers, so we did that with no affect on the speed.

I've heard 12.5 sp3 is faster than 11d, not slower, everything else is EXACTLY the same, we're lost on this one.

media server is also the domain controller - windows 2003 32bit server R2, backup up windows 32 bit and 64 bit R2 servers?

We are absolutly sure the new remote agents we're pushed out to the servers being backed up.

Has anybody else experienced this or have a possible solution with apparent problems with 12.5 sp3??

Thanks