Monitoring of residual encrypted data to improve erase performance on a magnetic medium

US9904488B2 · kind B2 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Erika M. Dawson · Tucson, US
• Scott M. Fry · Oro Valley, US
• Paul M. Greco · Coral Springs, US
• Gavin S. Johnson · Aromas, US
• Joel K. Lyman · Tucson, US
• Jon A. Lynds · San Jose, US
• Cory G. Smith · Mesa, US

Key dates

• Filing date: Jul 18, 2016
• Grant date: Feb 27, 2018
• Expiry date: Jul 18, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B2220/90
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

In one embodiment, a product includes a magnetic medium having written thereon data in a data track. The data includes encrypted data written over unencrypted data. An indicator of a physical position on the magnetic medium that corresponds to an end of the encrypted data is stored on the product. A product according to another embodiment includes a magnetic medium having written thereon data in a data track. The data includes encrypted data written over unencrypted data. A portion of the unencrypted data is located before the encrypted data on the medium. An indicator of a physical position on the magnetic medium that corresponds to a beginning of the encrypted data is stored on the product.