System backup
A backup for the system machine should be made at least once a week (for example, mksysb, tar, cpio). After completing the backup, verify the backed up information is valid by selecting and reading the media and data before storage.
Many backup software applications place locks on the files. This can cause corruption of the recovery database and the SMAT files. It can also panic an engine if an attempt is made to write to a log file that is locked.
In this case, if the exec folder is included in the backup: