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Spiral Format in the Multiple Surface Storage Device

IP.com Disclosure Number: IPCOM000109383D
Original Publication Date: 1992-Aug-01
Included in the Prior Art Database: 2005-Mar-24
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Inoue, K: AUTHOR [+4]

Abstract

Disclosed is a method to minimize a discontinuity gap in the spiral formatting of multiple surface medium. The elimination of the head switching between cylinder changes by the spiral format gives advantages over the popular circular format in the large data accessed in sequence.

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Spiral Format in the Multiple Surface Storage Device

       Disclosed is a method to minimize a discontinuity gap in
the spiral formatting of multiple surface medium.  The elimination of
the head switching between cylinder changes by the spiral format
gives advantages over the popular circular format in the large data
accessed in sequence.

      Fig. 1 shows the conceptual spiral format of this invention.
Surface N is formatted reversibly to Surface N+1.  By formatting
multiple disks in spiral direction opposite to each other, the ending
point of Surface N can be connected to the starting point of Surface
N+1, or the ending point of Surface N+1 can be connected to the
starting point of Surface N.

      Applying the above technique to the middle points on the
surfaces, multiple continuous data area can be achieved as shown in
Fig. 2.