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Slow performance copying files to new Windows SBS 2003 Server

Posted on 2004-03-24
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Last Modified: 2011-10-03
We've got a development environment with several servers -

NT4 SP6
Novell Netware
Windows 2000 SP4
Windows SBS 2003

The Windows SBS 2003 server is new, and we've noticed slow performance when copying files back and forth to that server from our workstations.  The workstation I've been testing from is a Win2K Pro SP4 workstation, so I shouldn't be seeing downlevel types of issues.  Here's my testing results.  I used a 920k Adobe Acrobat file.

Copying to and from NT4 server - almost instant (never saw "copying" window).
Copying to and from Novell server - almost instant (never saw "copying" window).
Copying to and from Windows 2000 server - ~3 seconds to copy
Copying to and from Windows SBS 2003 server - ~3 seconds to copy

Any ideas?  The new SBS 2003 server is a brand new Compaq 3 GHz machine with > 1 GB RAM, RAID 5 on 10krpm drives.  I wouldn't expect it to be this slow.
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Question by:mcrowley
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karel_jespers earned 125 total points
ID: 10668917
Slow SMB performance when you copy files over the network?

The default behavior of a Windows 2000 domain controller is to use security signatures when comminicating with the Server Message Block (SMB) protocol.

To workaround this feature:

1. Copy / Paste the following to a NoSlowSMB.reg file:

REGEDIT4

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters]
"EnableSecuritySignature"=dword:00000000
"RequireSecuritySignature"=dword:00000000

2. Run regedit /s <path>\NoSlowSMB.reg on your domain controller, and on you workstation if any of these data values are set to 1.

3. Shutdown and restart your Windows computer.

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by:mcrowley
ID: 10669028
Is there any good reason for the default behavior, before I disable it?
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Expert Comment

by:karel_jespers
ID: 10669181
that 's just for security that is not needed when you use it on your local network
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Author Comment

by:mcrowley
ID: 10671513
Worked like a charm.  Thanks.  Btw, another Windows 2000 member server (not a domain controller) is exhibiting the same slowness.  I certainly understand why a DC would have this flag set, but not a member server.  We'll run that same reg setting on it, though, and it'll most likely fix it too.

Thanks again.
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LVL 6

Expert Comment

by:karel_jespers
ID: 10671533
ok fine , pls let me know how it turns out on the member
tks and kind regards
karel
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