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Integrated Direct Access Storage Device System Expansion Unit

IP.com Disclosure Number: IPCOM000113989D
Original Publication Date: 1994-Oct-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Dimmick, RF: AUTHOR [+4]

Abstract

Disclosed is the strategy of utilizing common modular Direct Access Storage Device (DASD) package for a computer and its Storage Expansion Unit. The Figure shows the design of a computer and its Storage Expansion Unit that utilizes a common DASD package. These DASDs are identical and can be interchanged freely between either location. This ability to interchange the DASD simplifies maintenance on the machine and reduces hardware costs.

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This is the abbreviated version, containing approximately 87% of the total text.

Integrated Direct Access Storage Device System Expansion Unit

      Disclosed is the strategy of utilizing common modular Direct
Access Storage Device (DASD) package for a computer and its Storage
Expansion Unit.  The Figure shows the design of a computer and its
Storage Expansion Unit that utilizes a common DASD package.  These
DASDs are identical and can be interchanged freely between either
location.  This ability to interchange the DASD simplifies
maintenance on the machine and reduces hardware costs.

      The common DASD strategy is possible by sizing the DASD package
such that two DASDs can be placed in the main computer in lieu of two
electronic modules, or placed side by side in the Storage Expansion
Unit.  To achieve operation, the electrical, mechanical, and cooling
interfaces are identical.

      The DASDs are installed in the main computer by sliding them
into and adapter sleeve that is bolted to the cage.  This sleeve
helps guide the DASD to auto-dock directly with the backplane.  A
latch, used to aid in the installation, is locked to secure the DASD
in place.

      The DASDs are installed in the Storage Expansion Unit by
sliding them into a DASD Guide.  The DASDs auto-dock directly with
the backplane of the DASD Storage Expansion Unit and are locked into
position with the latch.

      The DASDs are cooled in both locations with air flowing
vertically.  To accommodate this, cooling air for the DASD Storage
Expansion unit enters...