We have an application that uses DBF files - users run the application on their own machines and access the data on the server via a share. This application is installed on thousands of sites, with all combinations of Windows 2000/XP and Windows Server from 2000 up to 2008.
Some users (on multiple different sites) with Windows Server 2008 are now starting to get Windows 7 workstations and are reporting that some operations now take many times longer to complete with this configuration.
There's a known issue with SMB2 whereby it will corrupt the index files associated with DBFs, as well as MS Access tables and other things that utilise what could be described as legacy approaches to locking. So we generally force things back to SMB1.
Aside from that is there anything else at an OS / network transport level that would hammer performance in this scenario ?