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:
May. 10, 2016
Filed:
Jul. 01, 2011
Andrew Patterson, San Jose, CA (US);
James Hughes, Palo Alto, CA (US);
Hao Zhang, Shenzhen, CN;
FUTUREWEI TECHNOLOGIES, INC., Plano, TX (US);
Abstract
A system and method for making snapshots of storage devices are provided. A method for making a snapshot of a volume includes setting the volume to a read-only mode, receiving an access attempt for the volume, and if the access attempt is a write access attempt, buffering information associated with the write access attempt in a buffer, and updating a snapshot indicator based on the information associated with the write access attempt, where the snapshot indicator includes block information regarding a block in the volume that is a target of the write access attempt. The method also includes if the access attempt is a read access attempt, providing read information requested in the read access attempt, where the read information is based on the volume, or a combination of the snapshot indicator, the buffer, and a buffer indicator.