When you use external storage, you should consider carefully those factors that could affect application performance. Keep in mind that the mainframe Transaction Processing Facility (TPF) does not support external storage.
The following factors can affect application performance:
- For the same physical resources, internal storage typically provides faster response times than external storage.
- External volumes must satisfy the performance characteristics and requirements for any applications that use them.
For example, SATA storage does not provide the performance requirements needed for OLTP applications.