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What are you using to copy the files with?<br />
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Try using a program like teracopy or robocopy see if anything changes.<br />
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They both buffer the data more efficiently
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What are you using to copy the files with?

Try using a program like teracopy or robocopy see if anything changes.

They both buffer the data more efficiently

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I was using a batch file to copy them. I will try the alternate software.
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I was using a batch file to copy them. I will try the alternate software.

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Yes I have a batch file that does that too <br />
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Keep us posted.
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Yes I have a batch file that does that too

Keep us posted.

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I will not be able to test the software (teracopy) until this weekend. I will check back after that.
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I will not be able to test the software (teracopy) until this weekend. I will check back after that.

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Decided to go another route
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I have a Windows 2008 R2 file/app server. One night a week, I copy some files to share on a NAS. This is a production server that has active users 24/7. During the time that the files are copying to the NAS, the server becomes almost inaccessible because of the bandwidth across the HP ProCurve Switch. I am thinking of utilizing QoS on the switch but not sure which is the best option. I thought of prioritizing ports first. For that, would I give low priority to SMB ports 137, 138, and 139?
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I have a Windows 2008 R2 file/app server. One night a week, I copy some files to share on a NAS. This is a production server that has active users 24/7. During the time that the files are copying to the NAS, the server becomes almost inaccessible because of the bandwidth across the HP ProCurve Switch. I am thinking of utilizing QoS on the switch but not sure which is the best option. I thought of prioritizing ports first. For that, would I give low priority to SMB ports 137, 138, and 139?

Windows 2008 Server R2 network backup throttling

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.