I recently upgraded my family’s network to gigabit ethernet. We started noticing that some shares would become inaccessible, and that restarting the Windows 7 server would solve the issue. I poked around the event viewer and found a few event ID 2017s from source srv, so I googled and found the following registry settings that should solve the issue:
Set HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\LargeSystemCache to 1.
Set HKLM\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters\Size to 3.
Thanks to alan.lamielle.net for this useful information.
Update 1-28-14: The server has been running well for a year and a half with no issues.