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Tandberg RDX Quickstor backup disk drive slow on BackupExec 11d.

Just had a new server put in, with a Tandberg RDX Quickstor backup disk drive. It's supposed to run at 45Mb/Sec , but we're only getting 5Mb/Sec on Symantec BackupExec 11d.

Can anybody shed some light on this?
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McArdleGroup
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McArdleGroup
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Iamthecreator OMAdministrateur Systeme et ReseauxCommented:
Have you configured a Backup to Disk or Removable Backup to Disk?
Is it only on the RDX that you get a slow throughput? If yes update the RDX firmware
If it runs slow on B2D created on a local volume (non RDX) with the same speed you could have the TOE issue
 
Backups targeted to a USB removable storage device with 160GB or larger cartridges may fail during verify with "Difference encountered in file data"
http://support.veritas.com/docs/305043 
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McArdleGroupAuthor Commented:
It is configured as a removable backup to disk.
We have had the RDX firmware update by our contracted support bods to v. 0044,
we are now up to 770Mb/minute according to BackupExec.

I'm running a backup of 7Gb to a local backup-to-disk folder to test your theory.
What is the TOE issue. Our server's NIC does have TCP offload capabilities
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Iamthecreator OMAdministrateur Systeme et ReseauxCommented:
Turn off the TOE for testing by running the following command on the server

NETSH INT IP SET CHIMNEY DISABLED

you will get OK as return

Run a backup and check the throughput
If there is an immense improvement you know its  the TOE (TCPIP OFFLOADINF ENGINE) that is causing the problem
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McArdleGroupAuthor Commented:
Is the TOE issue know to affect backup to local disks? This seems an odd side effect of a TOE.

I will run the test as suggested.
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McArdleGroupAuthor Commented:
The firmware update seems to have given us the biggest speed improvement.
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