NonStop S-Series System Expansion and Reduction Guide

HP NonStop S-Series System Expansion and Reduction Guide—522465-009
3-1
3 Planning System Reduction
This section defines the concept of a donor system and describes how to plan the
orderly removal of enclosures.
About the Donor System
Definition
You can remove enclosures from a system either to reduce that system or to add the
removed enclosures to another system. The system you remove enclosures from is the
donor system.
Caution
If any enclosures that you are planning to remove from the donor system are
responsible for critical processes and resources, you must move these processes
and resources to enclosures that will remain in the system.
Shutting down or moving processes and resources on a NonStop S-series system is a
complex task with serious implications. If you are not familiar with how to shut down
and move devices or subsystems in your system, see the appropriate manuals.
Topic Page
About the Donor System
3-1
Definition 3-1
Caution 3-1
Considerations 3-2
Are Both ServerNet Fabrics Up? 3-2
Can an Enclosure Be Removed Easily? 3-3
Remove All Enclosures at Once or One at a Time? 3-2
Is the Enclosure Providing Critical Resources? 3-4
Determining Communication Paths 3-6
Example Using the ServerNet Worksheets 3-6
Order of Removal 3-17
The Next Step 3-17