The default @sys name list in the OpenAFS Client is set to "x86_win32 i386_w2k i386_nt40" for 32-bit x86 systems. The default is "amd64_win64" for amd 64-bit versions of Windows.

The IFS redirector driver is aware of the process type. On 64-bit systems, there are two @sys name lists "SysName" which is used for the WOW64 environment and "SysName64" which is used for the 64-bit environment. If "SysName64" is not provided, "SysName" is used for all processes.