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OpenVMS Galaxy Configuration Considerations  



When you plan to create an OpenVMS Galaxy computing environment, you need to make sure that you have the appropriate hardware for your configuration. General OpenVMS Galaxy configuration rules include:

For more information about hardware-specific configuration requirements, see the chapter in this book specific to your hardware.

XMI Bus Support  

The XMI bus is supported only on the first instance (instance 0) of a Galaxy configuration in an AlphaServer 8400 system.

Only one DWLM-AA XMI plug-in-unit subsystem cage for all XMI devices is supported on an AlphaServer 8400 system. The DWLM-AA takes up quite a bit of space in the system because an I/O bulkhead is required on the back of the system to connect all XMI devices to the system. This allows only two additional DWLPB PCI plug-in units in the system.

Memory Granularity Restrictions  

Note the following memory granularity restrictions:

Incorrectly configured memory usually wastes memory.

EISA Bus Support  

The EISA bus is supported only on the first instance (instance 0) of a Galaxy configuration. Due to the design of all EISA options, they must always be on instance 0 of the system. A KFE70 must be used in the first instance for any EISA devices in the Galaxy system.

All EISA devices must be on instance 0. No EISA devices are supported on any other instance in a Galaxy system.

A KFE72-DA installed in other instances provides console connection only and cannot be used for other EISA devices.


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