Andrew S Tomlin

US Patent:

20160117112, Apr 28, 2016

Filed:

Jan 7, 2016

Appl. No.:

14/990100

Inventors:

- Irvine CA, US
Andrew J. TOMLIN - Irvine CA, US

International Classification:

G06F 3/06
G06F 12/10

Abstract:

A device may comprise a plurality of non-volatile memories configured to store a plurality of physical pages and a controller coupled thereto, configured to program and read data to and from the plurality of memory devices. The data may be stored in a plurality of logical pages (L-Pages) of non-zero length at starting addresses within the plurality of physical pages and execute first and second commands to indicate that first and second physical locations within the plurality of non-volatile memories no longer contains valid data and are now free space. This may be done by carrying out first and second virtual write operations of first and second L-Pages of a predetermined length at first and second unique addresses within a virtual address range that does not correspond to any of the physical pages, and accounting for an amount of free space gained as a result of executing the commands.

US Patent:

20140149826, May 29, 2014

Filed:

Nov 29, 2012

Appl. No.:

13/689673

Inventors:

WESTERN DIGITAL TECHNOLOGIES, INC. - , US
Leader Ho - Irvine CA, US
Radoslav Danilak - Cupertino CA, US
Rodney N. Mullendore - Cupertino CA, US
Justin Jones - Burlingame CA, US
Andrew J. Tomlin - San Jose CA, US

Assignee:

WESTERN DIGITAL TECHNOLOGIES, INC. - Irvine CA

International Classification:

G06F 11/10

US Classification:

714764

Abstract:

A data storage system configured to implement a data reliability scheme is disclosed. In one embodiment, a data storage system controller detects uncorrectable errors using intra page parity when data units are read from a set of pages. When an uncorrectable error is detected, the data storage system controller attempts to recover user data using inter page parity without using all data from each page of the set of pages. Recovery of user data can thereby be performed without reading all data from each page. As a result, the amount of time needed to read data can be reduced in some cases and overall data storage system performance can be increased.