Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Auto Physical Partition of a System

IP.com Disclosure Number: IPCOM000041597D
Original Publication Date: 1984-Feb-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Baldwin, CL: AUTHOR [+5]

Abstract

The mechanism described below can automatically physically partition a running multiprocessing (MP) system into two physical partitions without having to perform an initial microprogram load (IML) for the ongoing system. The mechanism is also able to bring the two partitions back together again. This is particularly applicable to an MP system that interfaces two service processors, with each service processor controlling its own side when the system is partitioned. When the system is running in MP mode, and it is to be physically partitioned, the operator enters a command to the system console to vary B side offline. The service processor decodes the command and checks that all B side elements have been varied offline.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 81% of the total text.

Page 1 of 1

Auto Physical Partition of a System

The mechanism described below can automatically physically partition a running multiprocessing (MP) system into two physical partitions without having to perform an initial microprogram load (IML) for the ongoing system. The mechanism is also able to bring the two partitions back together again. This is particularly applicable to an MP system that interfaces two service processors, with each service processor controlling its own side when the system is partitioned. When the system is running in MP mode, and it is to be physically partitioned, the operator enters a command to the system console to vary B side offline. The service processor decodes the command and checks that all B side elements have been varied offline. The service processor then idles the system controller, and initiates a warmstart to get the service processor on the ongoing side in command. The idle is then reset. The I/O associated with the offgoing service processor is configured off. The operator is asked to set the MP/PP switch to partitioned processing (PP). All functional elements for the offgoing side are marked as "offline", and the system continues. The system is returned to MP status when the operator enters a command to the system console to vary B side online. The operator is asked to set the MP/PP switch to MP. A signal is sent to the other service processor to reset and gate its I/O to this side. Remote adapters are enabled, the I/O is configure...