Browse Prior Art Database

Migration of Status Track Information from 3990 to Future Control Units

IP.com Disclosure Number: IPCOM000105642D
Original Publication Date: 1993-Aug-01
Included in the Prior Art Database: 2005-Mar-20
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Beardsley, BC: AUTHOR [+5]

Abstract

This publication describes a method for transferring information about a 3990 subsystem to a new Storage Control Unit that will be installed in its place. This transfer of information will allow the new Storage Control Unit to adopt the DASD (Direct Access Storage Devices) from the old 3990 so that the end user will not have to reestablish his environment with regard to Dual Copy Pairs.

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Migration of Status Track Information from 3990 to Future Control Units

      This publication describes a method for transferring
information about a 3990 subsystem to a new Storage Control Unit that
will be installed in its place.  This transfer of information will
allow the new Storage Control Unit to adopt the DASD (Direct Access
Storage Devices) from the old 3990 so that the end user will not have
to reestablish his environment with regard to Dual Copy Pairs.

     Information required by a new Storage Control Unit to maintain a
subsystem environment when that new Storage Control Unit is installed
in place of an old Storage Control Unit (and not changing any of the
Direct Access Storage Devices) is saved on a diskette by the old
Storage Control Unit and read in by the new Storage Control Unit.
This data consists of pointers to the Global Status Devices which
contain information that indicates the state of the Cache and NVS
(Non-Volatile Store).  This information allows the new Storage
Control Unit to adopt the existing Direct Access Storage Devices and
keep these devices in the same configuration as they had before the
Storage Control Units were changed.  It also allows the new Storage
Control Unit to bring the state of Cache and NVS to the same state as
in the old Storage Control Unit.