In order to support some legacy equipment in a CNC Machining shop, I recently installed a virtualized Windows 2000 server so more secure documents could be kept on their newer 2008 server without having to dumb down it's security. I am using VMWare Server 2.0 installed on this Windows 2008 R2 16 core, 16 GB Windows, SAS Raid 5 system to host this Windows 2000 VM. Plenty of resources as the host is underutilized right now
This solution has worked well and permitted these older machines, many running older DOS and WinCE operating systems connect without issue.
However, I am experiencing file copy and file open issues on Windows 7 64-bit machines. Windows XP clients are not experiencing this issue nor is the host machine running Server 2008 R2. Many times the 4MB-8MB xls and csv files they use cannot be opened by Excel (it just gives up and says it cannot open the file. File transfers that do work are about 50% of the throughput we get from host server (same hardware).
If i plug my laptop (Win7 Ult 64-bit) into the core switch (the same one the server is connected to), files open just fine. However, if I plug my laptop into a segment out (So two layer-2 hops: 1 GB/s Core -> 100Mbit switch), I have these same issues. A Windows XP machine plugged into the same config does not experience the same issue.
I have no difficulty RDP-ing into this server from the affected systems. DNS resolution is great. Windows 2000 is a member server and I have had no authentication issues.
Now, steps I have taken to troubleshoot:
I tried a brand new switch on an affected segment out of desperation, but I am still experiencing this issue.
I have left quite a bit of hair on the ground over this one. Would really appreciate some ideas.