Just curious. Are you sure its not something like AV scanning network
files on access? Generally once scanned they add them to a temp db of
"known good list" to prevent scanning when accessed later. If so, that
would explain slow performance when first accessing the files but
better responses when accessing after manually mapping drives.
Do you think its worth looking at network traces to see if any SMB
errors are occurring?
On 1/23/07, Laura E. Hunter <[EMAIL PROTECTED]> wrote:
So I have a VBScript that I use to map a network drive to a DFS share,
as follows:
strDriveLetter = "S:"
strBaseDrivePath = "\\<domain name>\<dfs root>\<share name>\"
Set objNetwork = CreateObject("WScript.Network")
objNetwork.MapNetworkDrive strDriveLetter, strBaseDrivePath
set objNetwork = nothing
When I map the DFS root using a drive letter using this code in a
login script, I get isolated-but-consistent client reports of network
latency when opening or saving a file; Word/Excel/whatever will choke
up for a good 5 or 6 seconds at a time.
If I disconnect the script-mapped drive and access this resource from
the same machine using any other method:
* map the drive using the GUI,
* map the drive from the CLI using 'net use', or
* manually enter the UNC path from the Run line
...all latency goes away. It's not OS-specific as far as I can tell;
the machines currently reporting the latency are a handful of XPSP2
and 2KSP4 machines that don't have much else unique in common.
I've determined that it's not specifically DFS-related, as I've tested
mapping directly to the physical servername instead of the DFS
sharename and produced identical results.
Neither is it relevant that the script is being run as part of a login
script/GPO, as running the script manually from an affected desktop
also produces the same behaviour.
So it's either a VBScript thing, or it's something client-specific
that I haven't isolated on the half-dozen desktops that are
experiencing the issue.
Google has thus far yielded no joy, has anyone run into this before?
--
-----------------------
Laura E. Hunter
Microsoft MVP - Windows Server Networking
Author: _Active Directory Cookbook, Second Edition_ (http://tinyurl.com/z7svl)
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