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:
One or more CPUs per instance.
One or more I/O modules per instance.
Dedicated serial console port or network access
per instance.
Memory:
Enough private memory for OpenVMS
and applications
Enough shared memory for the shared memory cluster
interconnect, global sections, and so on
Display for configuration management with either
an Alpha or VAX workstation running DECwindows or a Windows NT workstation
with an X terminal emulator.
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:
Private memory must start on a 64
MB boundary.
Shared memory must start on an 8 MB boundary.
All instances except the last must have a multiple
of 64 MB of memory.
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.