Drive rebuild

US9588842B1 · kind B1 · utility

Assignee

• PURE STORAGE, INC. · US

Inventors

• Marco Sanvido · Belmont, US
• Richard Hankins · San Jose, US
• Naveen Neelakantam · Mountain View, US
• Xiaohui Wang · Pittsford, US
• Mark L. McAuliffe · East Palo Alto, US
• Taher Vohra · Sunnyvale, US

Key dates

• Filing date: Dec 11, 2014
• Grant date: Mar 7, 2017
• Expiry date: Mar 15, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F2201/82
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A system and method for efficiently distributing data among multiple storage devices. A data storage array receives read and write requests from multiple client computers. The data storage array includes multiple storage devices, each with multiple allocation units (AUs). A storage controller within the data storage array determines a RAID layout for use in storing data. In response to determining a failure of a first AU, the storage controller begins reconstructing in a second AU the data stored in the first AU. For read and write requests targeting data in the first AU, the request is serviced by the first AU responsive to determining no error occurs when accessing the first AU.