Browse Prior Art Database

Modular Disk Assembly

IP.com Disclosure Number: IPCOM000116084D
Original Publication Date: 1995-Aug-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 58K

Publishing Venue

IBM

Related People

Boswell, GP: AUTHOR [+2]

Abstract

While the use of modular structures for housing computer components such as disk files provides considerable flexibility, it also raises problems. In a typical structure a file drawer has three fan assemblies to provide adequate cooling for a full complement of sixteen files. A feature of the drawer is that it has concurrent maintenance, meaning that a fan assembly could be removed while the drawer is working. The remaining two fans will speed up to overcome the loss of the fan removed, but unless the empty fan aperture is filled to prevent the air flowing out and by-passing the files in the rear of the drawer, the cooling system cannot be relied upon to cool the files for more than a few minutes.

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This is the abbreviated version, containing approximately 60% of the total text.

Modular Disk Assembly

      While the use of modular structures for housing computer
components such as disk files provides considerable flexibility, it
also raises problems.  In a typical structure a file drawer has three
fan assemblies to provide adequate cooling for a full complement of
sixteen files.  A feature of the drawer is that it has concurrent
maintenance, meaning that a fan assembly could be removed while the
drawer is working.  The remaining two fans will speed up to overcome
the loss of the fan removed, but unless the empty fan aperture is
filled to prevent the air flowing out and by-passing the files in the
rear of the drawer, the cooling system cannot be relied upon to cool
the files for more than a few minutes.

      Since there is no guarantee as to how long a fan may be
missing, the drawer must provide a means of ensuring the cooling
system works as intended.

      By the addition of a flap as described below, which will close
automatically and shut off the air flow when the fan is removed, such
a means is provided simply and economically.

      Referring to Fig. 1 the Fan/Power supply assembly 1 is located
in the subsystem in an open ended rectangular tunnel 2, tight fitting
at the sides and sitting on its base; there is clearance above itself
and the shelf under which it sits.  Into this space a flap 3 is
fitted.  The flap is a flat plastic molding with locating spigots 4
positioned on a flexure 5 that provide a pivot and enable...