Its pretty obvious what these do from their descriptions. Performance gain is rumoured to be up to 5% but I haven't tested to fully prove this assertion, and of course does not change in any way my view that every Oracle database should use raw devices.
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem] "NtfsDisableLastAccessUpdate"=dword:00000001 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem] "NtfsDisable8dot3NameCreation"=dword:00000001