Browse Prior Art Database

Memory Sub-assembly Identification

IP.com Disclosure Number: IPCOM000110722D
Original Publication Date: 1992-Dec-01
Included in the Prior Art Database: 2005-Mar-25
Document File: 1 page(s) / 61K

Publishing Venue

IBM

Related People

Blake, RM: AUTHOR [+3]

Abstract

Disclosed is a means to get correspondence between the memory array sub-assembly locations in a central storage assembly and the identity of the physical sub-assembly component actually installed in each location in order to gather accurate data for monitoring databases.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 65% of the total text.

Memory Sub-assembly Identification

      Disclosed is a means to get correspondence between the memory
array sub-assembly locations in a central storage assembly and the
identity of the physical sub-assembly component actually installed in
each location in order to gather accurate data for monitoring
databases.

      The problem that arises is that the sub-assemblies, for various
reasons, can be moved to different locations in the same central
storage or even moved to a different central storage and without a
means of identification, a history for the sub-assemblies cannot be
obtained.

      To form a unique electronic identification number for the
sub-assembly, a passive device is added with binary positions that
can be permanently set to either a 0 or a 1 at the time of
manufacture.  The passive device has enough binary positions to
provide a unique encoded value for all the sub-assemblies planned to
be manufactured.  In addition, binary positions are provided to
identify the type of sub-assembly, the EC level of the sub-assembly,
and the plant of manufacture for the subassembly.

      The memory array sub-assembly is of a conventional type having
the ability to place its chip sparing vector into predetermined bit
positions on its 72 bit data bus in response to a command from the
memory controller to fetch the sparing vector.

      The sub-assembly is designed to supply the unique encoded value
from the passive electronic identification device to...