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Problems with backup exec connected to destination via fiber

For about 1 year we have been using Backup Exec and sending the backup files to a server connected via multimode fiber at 100 speed.  The backup server is running Windows Server 2003 with a JBOD attached.  Our nightly backups are exceeding 130 gb.  Hoping to speed the transmission of the backup to the destination we decided to upgrade the fiber to gigabit speed.  We have a Cisco SR2024 switch at each end with Transition Networks mini-gbic modules for the fiber interface.  We are able to connect to the destination server without any problem.  The problem is that the backup is consistently failing at the 30 billion byte mark (+/- a few thousand bytes) when connect under the gigabit setup.  I can change the connection back to our original setup using D-Link switches at each end at the 100 base speed and the backup works perfectly.  Help, I am at a loss as to what could be causing this.
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mainelytrusses
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mainelytrusses
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QuoriCommented:
What error is the backup exec job failing with?
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mainelytrussesAuthor Commented:
BE is showing and error of V-79-57344-34036.  A little more information that we have learned.  
1.  We tried sending the backup job to a different NAS device, an Iomega 400r.  When we sent it to that device the backup woked just fine.
2.  We are assuming that something is going on with the Windows server 2003 that the JBOD is connected to.  It's almost like it can't keep up with the faster data flow.
BE-Error.jpg
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mainelytrussesAuthor Commented:
The problem ended up being some settings with the raid controller.  It was not backup exec specific.
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