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Windows 7: Speed problems when copying across network?


06 Sep 2010   #1

Windows 7 Professional 64bit
 
 
Speed problems when copying across network?

Hi folks,

I'm having some serious issues when copying files across my network. It's a gigabit network, both cards shown on the switch as green i.e. gigabit.

Both machines are Win 7 Pro 64-bit.

I've had a variety of problems with very slow copying. Currently copying 90GB stuff and it's going at 3.78MBps which is well short or even 100Mbps networking. I've tried it both ways, i.e. from A -> B from machine A and from machine B.

Sometimes it works fine one way and not the other.

Network card on one is an Intel Gigabit CT PCIe card, the other is a built in Atheros PCIe controller. Both with the latest drivers.

Any thoughts on how to speed this up? I was going to try jumbo packets but the cards both use different measurements for setting so I don't know how to match them.

Cheers
Paul.


My System SpecsSystem Spec
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06 Sep 2010   #2

Windows 7 Professional 64bit
 
 

I think I may have solved my own problem. I set the jumbo frames to 4K on each machine and now getting ~60MBps!
My System SpecsSystem Spec
06 Sep 2010   #3

Windows 8 Core X64
 
 

How did you do that? Might be helpful to someone else in the future.
My System SpecsSystem Spec
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07 Sep 2010   #4

Windows 7 Professional 64bit
 
 

It'll depend on the network card but basically:

Control Panel -> Device Manager

Open your network cards properties, then it'll normally be under advanced as Jumbo Frames. The value should match on all your network cards. You'll notice differences on different cards, i.e. Intel has 4088, 9XXX bytes and the Atheros one lists 2K, 3K, 4K etc MTU.

Also only do this on a gigabit network and make sure your switch supports jumbo frames.
My System SpecsSystem Spec
07 Sep 2010   #5

Windows 8 Core X64
 
 

I have a Broadcom NetXtreme 57xx Gigabit Controller, but there is no reference to Jumbo Frames in any of it's settings.

Thanks for the info though, I'll do some looking around and see what I can find about it.

Edit: I found this: Pchuck's Network

It's for Vista but works in Win 7 as well. Don't know if it will make any difference but I set it to 4078 (4096 - 18).
My System SpecsSystem Spec
07 Sep 2010   #6

Win7 HP (x64)/Win7 Ultimate (x64)
 
 

Quote   Quote: Originally Posted by probedb View Post
It'll depend on the network card but basically:

Control Panel -> Device Manager

Open your network cards properties, then it'll normally be under advanced as Jumbo Frames. The value should match on all your network cards. You'll notice differences on different cards, i.e. Intel has 4088, 9XXX bytes and the Atheros one lists 2K, 3K, 4K etc MTU.

Also only do this on a gigabit network and make sure your switch supports jumbo frames.

Thanks for sharing your solution.
I'm sure it's going to benefit a lot of users on this forum.

Regards
My System SpecsSystem Spec
08 Sep 2010   #7

Windows 7 Professional 64bit
 
 

No problem

Ztruker, just had a quick search and Broadcom.com - Ethernet NIC FAQs says

Quote:
How can I configure Jumbo MTU?
  1. In Microsoft Windows, right-click the Network Adapter in Network Connections, and then click Properties.
  2. Click the Configure button and then the General tab. Jumbo MTU is set at 1500 bytes by default. To increase the size of the received frames, increase the byte quantity in 500-byte increments up to 9000 bytes.
Netware: Jumbo Frame is configured by adding the "Jumbo=XXXX" parameter to the driver load command line in the AUTOEXEC.NCF file, where XXXX is a value between 1514 and 9000 bytes.
Linux: The MTU can be changed on the device in which support this feature using the following command: "ifconfig eth<X> mtu <Value>". <Value> can be between 1500 and 9000, <X> is the device ID.
NOTE: Please note that not all Broadcom networking devices support Jumbo-frame. Please consult the respective product documentation to confirm that your device supports this feature.
I think the note at the end is the important part as your card might not support them.

I force my Intel card to gigabit rather than auto-negotiation as sometimes something causes it to pick 100Mbps when it's perfectly happy with 1Gbps.
My System SpecsSystem Spec
10 Sep 2010   #8

Windows 8 Core X64
 
 

My Broadcom NetXtreme 57xx Gigabit Controller only has options for 10, 100 or Auto. No way to force it to 1Gps that I can find. Bummer.
My System SpecsSystem Spec
11 Sep 2010   #9

Windows 7 Professional 64bit
 
 

Quote   Quote: Originally Posted by Ztruker View Post
My Broadcom NetXtreme 57xx Gigabit Controller only has options for 10, 100 or Auto. No way to force it to 1Gps that I can find. Bummer.
That's a bit odd, does your card ever connect at 1Gbps? I.e. green light on a gigabit switch? If it's orange it's only 100Mbps.
My System SpecsSystem Spec
12 Sep 2010   #10

Windows 7 Professional 64bit
 
 

Tell a lie, it hasn't solved my issues at all.

It appears Win 7 just can't cope with copying lots of files across a network. It just randomly freezes all the time.

Shite.
My System SpecsSystem Spec
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