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:
Apr. 18, 2017
Filed:
Sep. 10, 2015
Datadirect Networks, Inc., Chatsworth, CA (US);
Micheal S. Parkhurst, Newbury Park, CA (US);
DataDirect Networks, Inc., Chatsworth, CA (US);
Abstract
A data storage system employs a de-clustered RAID (DCR) organization with a Vertical Rotation approach to prevent overflow of cache buffers. The Vertical Rotation Controller limits the size of the I/O operation relative to a respective Physical Disk Extent (PDE) to the cache buffer, and writes/reads a computed parity stripe matching the size of the cache, to form chunk bundles in the PDEs. When a bundle is filled in a first PDE residing at a first row, a PDE residing at a second row vertically displaced from the first row is engaged for forming another bundle. The process continues until all PDEs in a Vertical Rotation Group (VRG) are filled, or continues to a next VRG vertically displaced from a previous one to end I/O requesting.