Browse Prior Art Database

Rios Diagnostics Field Replaceable Unit Isolation Strategy

IP.com Disclosure Number: IPCOM000119880D
Original Publication Date: 1991-Mar-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 2 page(s) / 72K

Publishing Venue

IBM

Related People

Benignus, DM: AUTHOR [+2]

Abstract

A method is described which enhances Field Replaceable Unit (FRU) isolation capabilities and ability to do concurrent diagnostics.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Rios Diagnostics Field Replaceable Unit Isolation Strategy

      A method is described which enhances Field Replaceable
Unit (FRU) isolation capabilities and ability to do concurrent
diagnostics.

      Starting from the CPU system, resources can be viewed from the
center out.  Each of these resources can be thought of as a parent,
child, or sibling.

      Using the figure as an example:
           A is the parent of B and F.
           B and F are siblings of each other.
           B and F are children of A.
           B is the parent of C, D, and E.
           C, D, and E are siblings of each other.
           C, D, and E are children of B.

      Notice that part of the path from a parent to its children is
common.  This path could consist of a bus on a planar, cables, etc.
When a resource is selected for testing, the Diagnostic Controller
invokes the Diagnostic Application for that resource.  The resource
is tested. If no failures are detected, the resource, its parents,
and the path from the parent to the resource is considered good.  If
a failure is detected, then the failure could be the resource, its
parent, or the path from the parent to resource.

      To isolate the problem, the Diagnostic Application will pass
information back to the Diagnostic Controller indicating that a
failure was detected and additional testing needs to be done.  The
Diagnostic Controller will then check to see if a sibling of the
resource is available for testing.  If a sibling is available for
test, then the sibling will be tested.  If the sibling passes the
test, then the parent and the path to the selected resource is
considered good and only the selected resource is called out as
defective.  If the sibling fails the test, then either the parent or
the path to the selected resource is conside...