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Windows 7: Bizzarely Slow Network Shares


01 Sep 2009   #1

Win7 Professional
 
 
Bizzarely Slow Network Shares

Hey all,

Just set up Windows 7 RTM on one of the machines in our office and I'm noticing something very strange: when we try to open a network drive, it's taking upwards of 40 seconds. You double-click on the drive and then just sit there as the green bar just CRAWLS across the address box and then finally displays the contents of the drive.

What's worse is that it does the same thing every time you change a directory on the network drive.

Opening network resources via URI does the same thing. It's just strange.

I've already disabled RDC on the machine, and it hasn't made a difference after a reboot.

Has anyone seen anything similar? Any thoughts?

My System SpecsSystem Spec
.

01 Sep 2009   #2

Win 8 Release candidate 8400
 
 

how about disabling IPv6 support in network and sharing. could you tell us more abt your network setup?
My System SpecsSystem Spec
01 Sep 2009   #3

Win7 Professional
 
 

Yeah, already disabled IPv6.

Network setup, yeesh. Uh, 100mb internal network through a Cisco Catalyst 3650 (I think) which is uplinked to our datacenter via a 100mb metro fiber connection. Workstation has an Intel gigabit adapter.
My System SpecsSystem Spec
.


01 Sep 2009   #4

Win 8 Release candidate 8400
 
 

Quote   Quote: Originally Posted by MatthiasvW View Post
Yeah, already disabled IPv6.

Network setup, yeesh. Uh, 100mb internal network through a Cisco Catalyst 3650 (I think) which is uplinked to our datacenter via a 100mb metro fiber connection. Workstation has an Intel gigabit adapter.
OK con we assume its on a subnet with a domain controller, or is it a workgroup? when you set up win 7 did you set up a homegroup, (or a work like) workgroup?


K
My System SpecsSystem Spec
01 Sep 2009   #5

Win7/XP
 
 

Do you have any other redirectors? (Like a novell client?)
Have you tried a direct UNC map using the IP rather than the NBT Hostname? (Any difference there?)
My System SpecsSystem Spec
01 Sep 2009   #6

Win7 Professional
 
 

Nope, no Novell client or anything of that sort.
Using the direct UNC map with the IP is the same result. Same slow green crawl.

And we're on a subnet with a BDC, our PDC is up at the datacenter. Machine is joined to the AD domain.
My System SpecsSystem Spec
01 Sep 2009   #7

Win 8 Release candidate 8400
 
 

do you have indexing on for networked drives?
My System SpecsSystem Spec
01 Sep 2009   #8

Win7 Professional
 
 

I don't see it turned on in the indexing options.

This is also odd, the estimates of file transfer times are dramatically incorrect. Just copying a 1GB file, said 10 minutes, took 2. Weird.
My System SpecsSystem Spec
01 Sep 2009   #9

Win7/XP
 
 

Quote   Quote: Originally Posted by MatthiasvW View Post
I don't see it turned on in the indexing options.

This is also odd, the estimates of file transfer times are dramatically incorrect. Just copying a 1GB file, said 10 minutes, took 2. Weird.
Windows couldnt calc the xfer time of a 2k txt file correctly so I wouldnt worry too much about that... If this was XP, I'd be suggesting WIRESHARK to capture some info on the wire. (Look for failures, deltas between any 'conversations'...etc).. But I'm new to Windows 7 and I can't even think of any sniffers for Windows 7. (Any suggestions would be nice... ) I know this is a longshot...but... Have you eliminated the network as being a problem? If nothing can be tracked down regarding the OS, perhaps dropping the machine on a small switch with another box and trying a copy would give you more info.
My System SpecsSystem Spec
01 Sep 2009   #10

Win7 Professional
 
 

I doubt it's the machine or the network. Last Friday when this was still a Vista box it was doing great with the network drives.
My System SpecsSystem Spec
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 Bizzarely Slow Network Shares




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