Browse Prior Art Database

Algorithm for Entering Cartridges into an Automated Tape Library

IP.com Disclosure Number: IPCOM000111280D
Original Publication Date: 1994-Feb-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 4 page(s) / 70K

Publishing Venue

IBM

Related People

Thrall, JL: AUTHOR

Abstract

A method is disclosed for entering cartridges into an automated tape library that:

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 63% of the total text.

Algorithm for Entering Cartridges into an Automated Tape Library

      A method is disclosed for entering cartridges into an automated
tape library that:

1.  minimizes cartridge entry, and

2.  maximizes data availability and operator human factors.

The following algorithm is proposed for entering cartridges into an
automated tape library.

      When responding to the signal indicating presence of
cartridge(s) in the input station, the robotic accessor will scan the
input station starting at the top until a non-empty slot is
encountered.  The accessor will then continue the scan until an empty
slot is encountered.  At this time the accessor will stop scanning
and will move all scanned cartridges into library storage slots.
When this activity is finished, if the cartridge-present signal is
still present in the input station, the accessor will repeat the
process until the cartridge-present signal is no longer present.

      The likehood of multiple scans for non-contiguously placed
cartridges can be reduced by setting a "resume-scan" indicator when
the accessor begins to move cartridges from the input station into
library storage slots.  If the cartridge-present signal is not on
when the accessor finishes filing the input station cartridges, then
the resume-scan indicator is turned off.  When the cartridge-present
signal subsequently comes on, the accessor will then scan from the
starting location.  If the cartridge-present signal is on when the
accessor f...