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Tape Guard Band Reduction for High Track Density Storage

IP.com Disclosure Number: IPCOM000034760D
Original Publication Date: 1989-Apr-01
Included in the Prior Art Database: 2005-Jan-27

Publishing Venue

IBM

Related People

Authors:
Cannon, MR [+details]

Abstract

In high track density magnetic storage systems, manufacturing tolerances, tape interchange, and thermal and hydroscopic variations all cause track misalignment of a multitrack tape format. A write wide/read narrow tape format provides unused tape guard bands to accommodate these misalignments. At high track densities, the guard bands are a significant portion of the available tape surface. Consequently, it is desirable to reduce the guard bands. Currently, servo systems are commonly used to properly align a head to the recorded tracks on disks. Most servo techniques require a preformatted recording surface. However, advanced storage systems must also be designed to accommodate nonformatted 3480 tapes. A technique is described which allows an advanced machine to write a servo burst at beginning of tape.