Browse Prior Art Database

Moving Rack Automated Library for Removable Data Storage Media

IP.com Disclosure Number: IPCOM000105733D
Original Publication Date: 1993-Sep-01
Included in the Prior Art Database: 2005-Mar-20
Document File: 2 page(s) / 62K

Publishing Venue

IBM

Related People

Albrecht, TR: AUTHOR

Abstract

The following describes a mechanical architecture for an automated library which has unusually high volumetric efficiency and "fail-safe" redundancy.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 61% of the total text.

Moving Rack Automated Library for Removable Data Storage Media

      The following describes a mechanical architecture for an
automated library which has unusually high volumetric efficiency and
"fail-safe" redundancy.

      The system, which is referred to as a "Moving Rack Library", is
shown in the figures.  Media cartridges are stored in rectangular
arrays on two or more "racks", which are arrays of slots accessible
from both sides.  These racks are individually mobile on a set of
tracks or other linear bearings, and two automated pickers operate in
the the spaces between the racks.  Although many variations are
possible, the following arrangement is optimum for best volumetric
efficiency with no loss of accessibility in the event of a
single-point mechanical failure.

      The rails provide space for all racks plus four spaces (two at
the ends of the rails and two others between any pairs of racks).
The completely independent "picker" robots operate in two of the
spaces.  To access a cartridge in a rack not currently exposed to a
picker, the racks are moved so that a space opens up for access, and
the picker moves to that location.  Compared to conventional library
mechanical architectures, the moving rack library has relatively
little empty space, especially for libraries with many racks and many
cartridges.  The idea of using moving racks to improve volumetric
efficiency has already been used in the past for book libraries.

      The "fail-saf...