Browse Prior Art Database

Alternative Track with Track Change by Cylinder Change

IP.com Disclosure Number: IPCOM000116723D
Original Publication Date: 1995-Oct-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Nakamura, T: AUTHOR [+4]

Abstract

Disclosed is a invention where DASD handle the track change by cylinder change, and handle the defective track as Alternative track by track. In this way, the capacity is improved easily.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Alternative Track with Track Change by Cylinder Change

      Disclosed is a invention where DASD handle the track change by
cylinder change, and handle the defective track as Alternative track
by track.  In this way, the capacity is improved easily.

      Conventional method track change means head change, and DASD
handle the alternative track by cylinder.  This means that some good
tracks is unused by one bad track.  Fig. 1 shows the example of above
method.

      However, in this method, track change means cylinder change.
In this way, DASD can handle the alternative track by each track.
Fig. 2 shows the example of this method.