ButtonPuncher

Slow mapped network drive

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Has anyone run into a problem where you have a mapped drive and it takes a couple of minutes to show the folder list after clicking on it? My Computer/Explorer completely freezes until the folder list is shown. If I disconnect the share and change the drive letter, everything is back to normal. If I change the drive letter back, then the problem returns.

This is driving me nuts. I have a small network with 40 computers on it. Just a few days ago 6 of them started doing this.

They are all XP SP3 and our server is running Win2k Server SP4. Here's what I've tried so far:

MSConfig to disable all startup programs and services.

Disabled the Webclient service.

Disabled the Windows Image Acquisition service.

Run net use * /del /yes to delete all shares

If I access the server directly, it's fine. \server\data So it's not a DNS issue. It's just as soon as I map it with that one drive letter. If I change it to another letter, the problem is gone.

All 6 computers are running different versions of Office and Autocad. I am having an impossible time trying to find a common thread. The only thing that I can think of is that a recent Windows Update is causing it.

I can't change the drive letter on the map because autocad references the files by the drive letter, not the UNC name.

Let me know if you have any ideas.

Thanks,

Ben

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Hi there,

I usually do not personally support MS software, but....

To eliminate DNS from the equation, does the behavior change if you use an IP instead of the host name?

Example:

NET USE Z: \\computername\sharename /persistent:no /user:username password
vs.
NET USE Z: \\192.168.1.110\sharename /persistent:no /user:administrator password

Are the client "Virus scanners" trying to scan the persistently mapped drives?

Which PC is the "Master Browser"? How/when did it become the MB?

Frank

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Hi Frank,

When I try to connect directly, it's fine. Either 10.0.0.100\data or server\data. The problem pops up when mapping the network share to one specific drive letter. Changing the drive letter gets rid of the problem.

We are running Trend OfficeScan on all computers have the exact same version and configuration. I could try to unload the scanner but I really doubt that is it. I guess it's worth a shot, I've tried everything else that I can think of.

We only have the one file server. Just one server running Windows Server 2000 SP4 set up as the primary domain controller. It's been the same computer/hardware for the last 3+ years.

Thanks,

Ben

Edited by ButtonPuncher

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Ben, from what you say there is something about use of the particular drive letter.

Wild ideas ... on the domain controller you aren't assigning the Home Directory for the users' account to that letter ? Do you have virus protection scanning network drives ?

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Hi Frank,

When I try to connect directly, it's fine. Either 10.0.0.100\data or server\data. The problem pops up when mapping the network share to one specific drive letter.

Ben, I wasn't asking you to connect directly. I was asking is "if mapping the drive with an IP address rather than a hostname changes the behavior"

Personally, I am leaning toward the issue being something like a client side virus scanner, backup service, or file indexer being configured to read from the drive letter you are having issues with. Does your OS have a method to show which processes have open file handles? Something like Filemon?

Frank

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I figured it out.

There was a feature in Explorer on these particular computers. The "music task bar."

I just went into Folder Options -> View and hit "Reset all Folders" and "Restore Defaults"

Problem solved.

What a pain.

I still don't know why it was only affecting one drive letter and why it only surfaced now. Must have been a WMP update recently. I've really got to get WSUS up and running.

Thanks again for all of your help.

Later,

Ben

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