This configuration variable controls how files on a shared drive are opened if you are working in the Windows opportunistic locking mode. NT_OPP_LOCK_STATUS can take one of four values: CREATEFILE, SAFE, GETFILETYPE, or FAST. The default value is SAFE, which is a synonym for CREATEFILE.

If you set this variable to GETFILETYPE or FAST (synonyms for each other), the runtime uses the fast method of opening files.

Note: If your Windows installations are not completely up to date with all available patches from Microsoft, particularly those related to opportunistic locking, the GETFILETYPE or FAST setting may cause file corruption (error 98).