OpenTP1 files contain important information that is used in situations such as recovery of an OpenTP1 process. To prevent OpenTP1 files from being irrecoverably corrupted, the user should periodically backup each OpenTP1 file system or each OpenTP1 file. For example, the backups can be made whenever OpenTP1 starts. After a backup has been made, even if OpenTP1 files are destroyed or corrupted, the user can use the backups to restore the files.

The following figure illustrates the process of backing up and restoring an OpenTP1 file system.

Figure 4-4 OpenTP1 file system backup and restore

User files contain data important for applications. OpenTP1 provides the DAM FRC facility and related commands to guarantee such individual items of data. Using this facility and related commands you can:

• Back up or restore user-dedicated files.
• Restore a user file, based on a backup or based on a file copied from a system journal file.

For details about backing up and restoring or about the procedure for restoring user files, see the manual OpenTP1 Operation.