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Blocking Machine Serial Number Propagation Via System Tools

IP.com Disclosure Number: IPCOM000115350D
Original Publication Date: 1995-Apr-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Goolsbey, MA: AUTHOR [+2]

Abstract

A means of automatically copying a machine serial number to replacement parts of a machine without the ability to create a duplicate machine serial number by combining replacement parts is described. Replacement parts can be used to fix broken parts in a machine but the parts can not be combined to form two machines with the same serial number.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 76% of the total text.

Blocking Machine Serial Number Propagation Via System Tools

      A means of automatically copying a machine serial number to
replacement parts of a machine without the ability to create a
duplicate machine serial number by combining replacement parts is
described.  Replacement parts can be used to fix broken parts in a
machine but the parts can not be combined to form two machines with
the same serial number.

      If a machine serial number is stored in a memory storage
device, such as an EEPROM or DISK, in three different replaceable
machine parts, then if one of the parts fails, the serial number can
be copied from one of the other parts as long as two of the serial
numbers compare.  To prevent the ability to duplicate the same
machine serial number by replacing two of the three parts in the
original machine (replacing each part one at a time) and then putting
the two replaced parts in a third machine, a sequence number is
stored with all copies of the machine serial number each time the
serial number is copied to a replaced part.  Every time the machine
serial number is copied to a replaced part, a check is made to
determine if two of the serial numbers match AND if the sequence
numbers also match.  If both conditions match, then the machine
serial number is copied to the replaced part AND the sequence number
is incremented by one and written to all three parts.

      If two parts are removed from the original machine, one at a
time, the original mach...