Customizing PowerHA SystemMirror disk processing
Some disks might behave sufficiently differently from those supported by PowerHA® SystemMirror® so that it is not possible to achieve correct results by telling PowerHA SystemMirror to process these disks exactly the same way as supported disk types. For these cases, PowerHA SystemMirror provides finer control. While doing cluster configuration, you can either select or specify one of the specific methods to be used for the steps in disk processing.
PowerHA SystemMirror supports the following disk processing methods:
- Identifying ghost disks
- Determining whether a disk reserve is being held by another node in the cluster
- Breaking a disk reserve
- Making a disk available for use by another node
Using PowerHA SystemMirror you can specify any of its own methods for each step in disk processing or to use a customized method, which you define. This allows you to use a custom-defined method only for configuring a disk, and to use the existing PowerHA SystemMirror methods for other disk operations.