Jump to content

Slow SMB transfer from Windows 7 to Server 2012 R2


Recommended Posts

Hi. I'm trying to transfer large files from a Windows 7 machine to a Windows Server 2012 R2 box and I'm only getting around 45 MB/s. The entire network is on gigabit and I know that both the Windows 7 machine and the server are capable of saturating the gigabit link.


If I transfer a single large file to the server, I only get around 45 MB/s, but if I start a second transfer while the first is running then the total speed goes to 85-90 MB/s. Then if I start a third transfer, my total speed goes to 110-115 MB/s which is very close to the gigabit speed limit. Slow read/write speeds on either end are not an issue, the storage devices on both ends are capable of read/write speeds in excess of 300 MB/s.


Also, if instead of "pushing" the files to the server, I "pull" a single large file to the server (from the Windows 7 machine) then I get around 90-95 MB/s. Anyone know what could be causing this? I need to transfer a lot of large files to the server, but they must be done sequentially not in parallel and pulling them all from the server side is not an option. I need to find a way to get the full speed on individual file transfers coming from the Windows 7 box to the server.


The Windows 7 machine has an integrated Intel 82579V Gigabit Ethernet chip. The server has a Realtek Gigabit controller, not sure what chip. Both machines have the latest network drivers installed. I tried changing some of the advanced driver settings on the Windows 7 machine like enabling Adaptive Inter-Frame Spacing and a few others, but they seem to have no effect on transfer speeds. Any suggestions to improve transfer speeds would be greatly appreciated!

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Create New...