This guide describes how to install up to six IO4 boards into a CHALLENGE® or POWER CHALLENGE™ XL system. Earlier, these rackmount systems could support only four IO4 boards. However, by following strict configuration guidelines outlined in this guide, you can now install six IO4 boards into these systems.
This information is written for Silicon Graphics® system support engineers (SSEs) and third-party field support groups responsible for product installation and testing.
It contains the following chapters:
Chapter 1, "Configuration Guidelines," provides a description of the hardware and software configuration requirements that must be observed as well as product limitations.
Chapter 2, "Installing the Additional IO4 Boards," describes how to install up to six IO4 boards into a CHALLENGE or POWER CHALLENGE XL system and also discusses special internal cabling considerations.
Appendix A, "VMEbus Power Issues," discusses VMEbus power guidelines for cardcage 2 and cardcage 3.
Be sure to read the following information before you begin installation.
 | Warning: Installation of these upgrades requires specific training and technical knowledge. These instructions are provided for use by Silicon Graphics system support engineers (SSEs) or other Silicon Graphics trained personnel only. This equipment utilizes electrical power internally that is hazardous if the equipment is improperly disassembled. |
 | Caution: This equipment is extremely sensitive and susceptible to damage caused by electrostatic discharge (ESD). ESD is an electrical discharge caused by the build-up of electrostatic potential on clothing and other materials. You must use proper measures. |
Follow these ESD measures:
Connect a ground strap to your wrist when installing and removing peripherals.
Be sure that you and all of the electrical equipment that you handle during this installation remain at a ground potential of zero to avoid damage from ESD.
Remove a board from its antistatic bag only when you are properly grounded with a ground strap, and only when you are working on the board or installing it.
Do not use an ohmmeter on a board.
These type conventions and symbols are used throughout this manual:
| Italics | Filenames, variables, IRIX command arguments, command flags, titles of publications, icon names. | |
| Screen type | Code examples, file excerpts, and screen displays (including error messages). | |
| Bold screen type |
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