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:
Feb. 12, 2013
Filed:
Sep. 27, 2007
Kendell Chilton, Southborough, MA (US);
Sachin More, Westborough, MA (US);
Kendell Chilton, Southborough, MA (US);
Sachin More, Westborough, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
In a data storage system, a controller schedules I/Os to storage devices so that each one substantially performs only reads or only writes, thereby increasing performance. At least one storage device is designated as a current write device. The remainder of the devices are designated current read devices. Host write data is stored in a buffer memory. Storage device reads occur only from the current read devices. Storage device writes occur only to the current write device(s). In response to a triggering event, the designations are updated so that a different storage device is designated the current write device, and the remainder of the storage devices are designated the current read devices. A triggering event may include but not be limited to a time period, number of writes, cache size, device wear, environmental conditions, application requirements, or combination.