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Using Data Mirroring to prevent loss of redundancy following failed drive firmware download

IP.com Disclosure Number: IPCOM000031015D
Original Publication Date: 2004-Sep-07
Included in the Prior Art Database: 2004-Sep-07

Publishing Venue

IBM

Abstract

When drives are shipped, they are running a certain level of firmware. As time progresses, defects in the shipping level of code may be uncovered, and updated versions made available. As a result, it is advantageous for the drive owners to download updated firmware as it becomes available, in order to protect themselves against the adverse effects of the defects. Unfortunately, downloading firmware to drives is risky and can lead to temporary or permanent loss of access to the device. In some cases, the risk associated with a download is greater than the risk associated with running an old level of code (or "downlevelled" code), so drive owners choose not to perform the code upgrade. This article describes a method that removes the risk of "loss of access" from the downloading procedure, thus allowing drive owners to keep their drives up to date without having to weigh up the associated risks.