Posted by Grant Foraker on March 14, 2008 at 07:34:13:
From a Microsoft tech support forum for Vista. Debug steps probably work with XP and Server 2003.
---------------------------------------------------------------------From the problem description of the post you submitted, my understanding is: You have encountered a slow performance while attempting to copy files from a Vista laptop to a HP business notebook. If I have misunderstood about your concern, feel free to let me know.
Before moving on, I would like to confirm the following information:
Does performance improve when copying files via the command line as opposed to Windows Explorer interface? File copies via the command line use the SMB protocol and the redirector component while file copies through the GUI use the redirector and the shell components.
If the file copy is also slow from the command line, please take the
following steps to do the troubleshooting:
Step 1: Check the Network Adapter
==================================================
1. Update the Network Adapter to the latest driver from the manufacturer. NOTE: Although this is a simple step, this has fixed a large number of slow file copy cases.
2. Go to Device Manager -> Right click on the Network Adapter -> Properties -> Advanced, please temporarily disable TCP and IP checksum offloading. This will cause this processing to be handled by Windows TCPIP stack instead of the Network card.
3. Set the Network Card and Switch from Autodetect to a hard coded link speed such as 100mb/half duplex.
Step 2: Add the CopyFileBufferedSynchronousIo registry entry
==============================================
1. Click Start, type regedit in the Start Search box, and then press ENTER.
2. Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\System
3. On the Edit menu, point to New, and then click DWORD Value.
4. Type CopyFileBufferedSynchronousIo to name the new entry, and then press ENTER.
5. Right-click CopyFileBufferedSynchronousIo, and then click Modify.
6. In the Value data box, type 1 , and then click OK.
7. Exit Registry Editor
Step 3: Adjust the MTU settings for VPN connection:
==============================================
a. On Vista notebook, please try to ping the File Server (laptop) site with the following command:
ping 192.168.0.7 -f -l 1472 (replace 192.168.0.7 with the IP of the File
server laptop)
Will you receive the following response?
Reply from 192.168.0.7: bytes=1472 time=74ms TTL=58
b. If you receive a negative response, please try to ping with reduced packet size of 10 (1462), will the ping work?
c. Repeat step b using a smaller MTU size. Repeat this process to check if the ping command will succeed.
Each file can be a maximum of 1MB in length Uploaded files will be purged from the server on a regular basis.