Database repair guidelines

The following topics provide guidelines for repairing a database. Use the information to understand why you need database repair and how you can repair your database.

Why pointers are important
Before you repair a database, you must understand why database pointers are important.
How a database can become corrupted
Human error is the most common cause of a corrupted database. The following table shows the most common ways that pointer errors are introduced into IMS databases.
Various methods of repairing a corrupted database
When a database is discovered to be corrupted, you must repair it immediately.
Repairing a database by using HD Pointer Checker and zapping
Use the following topics to repair a database by using HD Pointer Checker and zapping.
Repairing HALDB partition reorganization numbers and duplicate ILKs
If you identify corrupted HALDB partition reorganization numbers, duplicate ILKs, or potentially duplicate ILKs in your HALDB databases, you can repair them by running the HD Pointer Checker utility and then the ILK Repair utility of IMS Database Repair Facility.

Parent topic: HD Pointer Checker utility