Browse Prior Art Database

Multiple Volume Magnetic Media Readability

IP.com Disclosure Number: IPCOM000103988D
Original Publication Date: 1993-Feb-01
Included in the Prior Art Database: 2005-Mar-18
Document File: 1 page(s) / 39K

Publishing Venue

IBM

Related People

Leggate, JW: AUTHOR

Abstract

Disclosed is a process that minimizes the probability of media errors during installation of software distributed on multiple volumes of magnetic media. The process restricts production of software to a single writer drive for each set of software thereby minimizing the number of writer drives any given customer or target reader drive must be interchangeable with. Several critical parameters affect the interchangeability of data from one drive to another. Among these are: track placement, track width, head skew, write amplitude, read gain, and uniform bit density. These parameters are a function of device physical dimensions, electro-mechanical characteristics of the magnetic head and its electronics and the speed of the drive.

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Multiple Volume Magnetic Media Readability

Disclosed is a process that minimizes the probability of media errors
during installation of software distributed on multiple volumes of
magnetic media.  The process restricts production of software to a
single writer drive for each set of software thereby minimizing the
number of writer drives any given customer or target reader drive
must be interchangeable with.  Several critical parameters affect the
interchangeability of data from one drive to another.  Among these
are:  track placement, track width, head skew, write amplitude, read
gain, and uniform bit density.  These parameters are a function of
device physical dimensions, electro-mechanical characteristics of the
magnetic head and its electronics and the speed of the drive.  A
drive having critical parameters toward one end of the tolerance
limits may have difficulty reading media written by a drive with
parameters at other limits.  Magnetic media is also susceptible
contamination by debris in the writer drive or by being scratched or
damaged by that drive in the writing process.
     The reader drive will observe less variation in these critical
parameters within a set of media when the entire set has been written
by the same drive.  The reader drive then has a much higher
probability of successfully reading subsequent volumes given that the
first volume was successfully read.  The perceived quality of the
software package is greater independent of changes mad...