The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 11, 2001
Filed:
Dec. 27, 1995
David W. Gordon, Boulder, CO (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
A fault tolerant storage subsystem includes a first tier of failure independent data storage units coupled to a storage controller, and a second tier, including at least one failure independent data storage unit, coupled to at least one of the failure independent data storage units in the first tier for providing further fault tolerance thereto. The first tier of failure independent data storage units may include a partially heterogeneous group of data storage units, which may include a solid state data storage unit. Data blocks representative of data received from the storage controller are stored on at least a first subset of the first tier of failure independent data storage units and associated redundancy blocks representative of redundancy information associates with the data blocks are stored on a second subset of the first tier of failure independent data storage units.