NonStop S-Series System Expansion and Reduction Guide

Planning System Expansion
HP NonStop S-Series System Expansion and Reduction Guide—522465-009
2-8
Choosing Which Block Structure to Use
Choosing Which Block Structure to Use
Because there are so many different ways to combine enclosures into blocks, plan
ahead of time which block structures will best meet your needs. Every system is
different, so the best way to add blocks to your system depends on many factors:
•
How you use your system
•
The software and adapters on your system
•
The topology of your system
•
The number and arrangement within that topology of the enclosures already
existing on your system
•
Whether you are changing system topology as you resize your system
•
Whether you might change the topology in the future
•
Whether you will only expand your system or whether you might reduce it at some
time as well
•
The physical layout of your computer room
Issues such as whether you might change system topology in the future, or whether
you will be reducing one system and using those enclosures on another system,
should be planned with your systems analyst and your service provider.
However, you can clarify many of these issues by filling out Worksheets 3 and 4 (for
Tetra 8 topology) or Worksheets 5 and 6 (for Tetra 16 topology) from Appendix C,
Checklists and Worksheets. When you fill out these worksheets, you can see the block
structures that you can use to expand or reduce your system.
The rest of this section shows how the worksheets in this guide can clarify the
possibilities for resizing your system.
Example of Choosing a Block Structure
This example uses a NonStop Sxx000 system configured as a Tetra 16 topology. The
worksheet shown in this example is only for the X fabric. The tasks for the Y fabric are
identical.