ReadyNAS NV+ Seems really slow

Evil Olverlord wrote:
*2 Command line: "netsh interface ipv4 show subinterfaces", to see MTU preparatory to resetting it to 1430 (or 1460 or 1492). Command not found. True whether I run the command as administrator or regular. Some suggest this only works in Vista.

It should work in Windows 7. I have tested in both Windows Pro 32-bit & 64-bit versions:

64-bit Version of Windows 7 Pro

C:\Users\admin>ver
Microsoft Windows [Version 6.1.7600]

C:\Users\admin>netsh interface ipv4 show subinterfaces
MTU MediaSenseState Bytes In Bytes Out Interface
------ --------------- --------- --------- -------------
4294967295 1 0 23660 Loopback Pseudo-Interface 1
1500 1 24129245 908280 Local Area Connection

C:\Users\admin>netsh interface ipv4 show subinterface "Local Area Connection"
MTU MediaSenseState Bytes In Bytes Out Interface
------ --------------- --------- --------- -------------
1500 1 24131789 909003 Local Area Connection

32-bit Version of Windows 7 Pro

C:\Users\dbott>netsh interface ipv4 show subinterfaces

MTU MediaSenseState Bytes In Bytes Out Interface
------ --------------- --------- --------- -------------
4294967295 1 0 15653002 Loopback Pseudo-Interface 1
1500 1 5245469969 4303407861 Local Area Connection

C:\Users\dbott>ver
Microsoft Windows [Version 6.1.7600]

A few other things:

1. What is the make & model of your router?

2. Have a look at this document to see what level of performance you should expect: http://home.bott.ca/webserver/?p=363. In your case, the XP machine seems to be performing properly but the Win7 machine seems to be painfully slow, indicating that the issue is not likely a hardware issue with the NAS. In the article linked to above, check the next steps section and try a direct connection to see if it improves. If not, try setting the MTU on the NAS to 1492.