Browse Prior Art Database

Means to Prevent Improper Usage of "New" Tape Cartridge Media

IP.com Disclosure Number: IPCOM000104045D
Original Publication Date: 1993-Mar-01
Included in the Prior Art Database: 2005-Mar-18
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Allen, V: AUTHOR [+3]

Abstract

The process of developing 'new' media for storage of data via tape drives can result in a formulation which is incompatible with earlier drives.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 75% of the total text.

Means to Prevent Improper Usage of "New" Tape Cartridge Media

      The process of developing 'new' media for storage of data via
tape drives can result in a formulation which is incompatible with
earlier drives.

      For instance, the Enhanced Capacity Cartridge System Tape,
jointly developed by IBM and 3M Corporation, is based on the industry
standard 1/2 inch tape cartridge originally introduced by IBM in the
mid 1980's to work with the IBM 3480 tape drives.  The new
tape/formulation along with certain unique capabilities of IBM 3490E
greatly improve the capacity for tape customers.

      To achieve this much increased capacity, new formulas for tape
manufacturing are developed.  These new properties of the media may
make it unsuitable for other/older drives.

      The problem therefore is to find a way for the 'new' media to
use existing form factors and other major characteristics of the
earlier tape media, but eliminate the exposure of tape customers from
using 'new media' on drives for which it was not intended without
requiring any change to existing tape drives, tape media, tape
handling, tape operations, etc.

      A solution to this problem was found to be modification of the
file-protect selector within the 'new' cartridge such that the 'new'
cartridge would always appear to be file protected when mounted on
older drives.

      The attached figure shows the file protect indicator.  In the
case of old/earlier drives, the file prot...