Browse Prior Art Database

Automatic Extension of Erase Gap Patterns in 1/2" Tape

IP.com Disclosure Number: IPCOM000064769D
Original Publication Date: 1985-Sep-01
Included in the Prior Art Database: 2005-Feb-19

Publishing Venue

IBM

Related People

Authors:
Dodt, WC Kirkpatrick, CR Robinson, FL [+details]

Abstract

In half-inch tape technology, it is often necessary to space over damaged areas of tape (i.e., oxide voids or creases). Previously, this has been accomplished with a host command to DC erase over the damaged area of tape and attempt to rewrite the record. If the read-back check was still bad, another command was needed from the host to extend the DC erase level further down the tape. The DC erase level, when used in this manner, is called an "erase record gap" (ERG). This sequence is repeated as many times as required to get over the damaged area of tape. The following describes a method (utilizing a written pattern unique from other symbols or records on tape) of writing an ERG by issuing a disconnected command to the device.