Storage Technology Corporation

Christophe Carret

Charles Allen Milligan

Philippe Y Le Graverand

Gerald O'Nions

James Prescott Hughes

Jacques Debiez

Alain Maurand

A method, system and program for generating parity in a data storage system are provided. The invention comprises organizing an incoming data block into a specified number of data stripes and cascading the data stripes into a parity creation mechanism. The parity creation mechanism creates a specified number of parity stripes based on the data stripes, wherein the number of parity stripes is independent of the size of the data block. The parity creation mechanism can operate offline to reconstruct lost data stripes and parity stripes without using critical system resources, wherein the number of devices required for stripe reconstruction is less than the combined number of data stripes and parity stripes.

Process for generating and reconstructing variable number of parity for byte streams independent of host block size

An automated storage system includes a media storage facility, which may take the form of an automated storage library or shelf system. The media storage facility includes a plurality of individual medium slots and a plurality of superset slots. The facility further includes at least one mechanism for accessing individual media and at least one mechanism for accessing supersets of media. Individual media located in a superset remain accessible on an individual basis in addition to being accessible as part of the corresponding superset.

Automated storage system for individual and supersets of media

Growing community of inventors

Toulouse, France

Christophe Carret