Another possible issue could be this: The SACK option is always set to "true" even if network adapter does not support SACK for offloaded connections in Windows 7 or in Windows Server 2008 R2
http://support.microsoft.com/kb/2525390 Cheers, Phil -- Phil Randal Infrastructure Engineer Hoople Ltd | Thorn Office Centre | Hereford HR2 6JT Tel: 01432 260415 | Email: [email protected] From: Ziots, Edward [mailto:[email protected]] Sent: 07 March 2012 13:36 To: NT System Admin Issues Subject: RE: File copy performance - XP vs Win7 Pretty easy to find out what is going on if you took a packet-sniff on the XP box and on the Windows 7 box to the endpoint. It could also be related to SMB V1 vs V2 (Windows 7) settings and whether or not the server is Windows 2003 ( V1) vs Windows 2008 V2. Z Edward Ziots CISSP, Security +, Network + Security Engineer Lifespan Organization [email protected]<mailto:[email protected]> From: Richard McClary [mailto:[email protected]]<mailto:[mailto:[email protected]]> Sent: Tuesday, March 06, 2012 4:05 PM To: NT System Admin Issues Subject: RE: File copy performance - XP vs Win7 It was once about 40 minutes; it's now 90-100 minutes. Again, all that has changed is the machine to which the file is copied. (As someone else asked, the new machine does in fact use the same network jack, same switch port, and same cable as the old machine.) Anyway, this has now simply become a curiosity. We have been directed to find an alternative to copying backup files to a person's desktop machine and burning to DVD (I can think of a couple already), so thanks to all who answered. -- richard From: Andrew S. Baker [mailto:[email protected]] Sent: Tuesday, March 06, 2012 2:50 PM To: NT System Admin Issues Subject: Re: File copy performance - XP vs Win7 I haven't seen any mention of actual recorded time for the backups involved. How much time did it take before? How much is it taking now? ASB http://XeeMe.com/AndrewBaker Harnessing the Advantages of Technology for the SMB market... On Tue, Mar 6, 2012 at 2:08 PM, Richard McClary <[email protected]<mailto:[email protected]>> wrote: Greetings! Our DBA created a backup system for our DB2 databases where a VM (running DB2 for the tools) would back up our medical records database (on another server), create ZIP files (the zip script was set to create zip files from the database backup in 4 Gb chunks), then copy those chunks to a user's desktop PC. The principle user of that PC would then burn the ZIP files onto DVDs for storage. The zip files total a bit over 5 Gb. Back when the "target PC" was my own, I had a Dell PWS-390 running XP Pro SP3, 32-bit. The "target PC" is now an Optiplex 990 running Windows 7 Pro, 64-bit. Our DBA says the copy from the backup system to the "target PC" seems to take twice as long copying to the Win 7 machine than it did to the Win XP machine. Any ideas as to what might be slowing down the copy process? (FWIW, the motherboard on that PWS-390 failed a couple of months back, so a side-by-side test would require scrounging up a still-functional PWS-390, installing XP, etc.) Thanks! -- richard -- Richard D. McClary Jr Infrastructure Architect, Information Technology Group ASPCA(r) 1717 S. 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