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Browse Prior Art Database

Concurrent Maintenance for System Elements

IP.com Disclosure Number: IPCOM000120952D
Original Publication Date: 1991-Jun-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 1 page(s) / 69K

Publishing Venue

IBM

Related People

Sutton, AJ: AUTHOR

Abstract

Many systems are either controlled by one power boundary (the whole element) or it is divided into separable power boundaries (elements). The more general rationale for separate boundaries is for bring up and use in manufacturing and test wherever parts of a system (that has multiple boundaries) can be tested or worked upon while the other parts of the system are powered.

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This is the abbreviated version, containing approximately 53% of the total text.

Concurrent Maintenance for System Elements

      Many systems are either controlled by one power boundary (the
whole element) or it is divided into separable power boundaries
(elements).  The more general rationale for separate boundaries is
for bring up and use in manufacturing and test wherever parts of a
system (that has multiple boundaries) can be tested or worked upon
while the other parts of the system are powered.

      When the system is functionally operating and a failure occurs
in any one of the boundaries the whole system may have to be powered
down to repair the failing element and then power up the system.

      In a computer system, elements such as a processor or channel
can be configured out of the system if not used, likewise an element
can be added to the configuration. However, if the element has to be
powered off while the system is running, then a new design is
required in order to prevent any damage to the rest of the system
when power is turned off or turned on.

      This invention describes a procedure applied to a computer
system, when a failing element is to be repaired concurrently with
the rest of the system running.  The maintenance engineer enters a
command, to a service processor, the command identifies the element
to be powered off and the sub-element within the element (such as a
TCM on a board).  The service processor then verifies the element is
not in the active configuration (software has taken it out of the
confi...