• Creation of physical file
  Before creating OpenTP1, the user must create status files in an OpenTP1 file system with the stsinit command. Status files for both systems A and B must be created. The physical files for system A or B must be created over multiple disks. If all the physical files of either system are created on a single disk, error in the entire disk disables the system. Full recovery of OpenTP1 requires at least one normal file for each of systems A and B, and is impossible with single system's file(s). The name of the physical file must be same as the status file name in the status service definition.
  
• Correspondence between a physical file and a logical file
  Next, the names of the created status files and a logical file name must be specified in the status service definition. A logical file name is a user-assigned name to be used to associate the status files for both systems A and B as a set.
  

Whether one-system operation is to be selected when only the status file for either system A or B can be used must be specified in sts_single_operation_switch of the status service definition.

For details of the status service definition, see the manual OpenTP1 System Definition.