PMC-Sierra Assigned Patent
Tolerating failed page in flash device
By Francis Pelletier | June 23, 2015 at 2:44 pmPMC-Sierra, Inc., Sunnyvale, CA, has been assigned a patent (9,047,214) developed by Northcott, Philip L., Coquitlam, CA, for a “system and method for tolerating a failed page in a flash device.”
The abstract of the patent published by the U.S. Patent and Trademark Office states: ”Apparatus and methods provide relatively low uncorrectable bit error rates, low write amplification, long life, fast and efficient retrieval, and efficient storage density such that a solid-state drive, (SSD) can be implemented using relatively inexpensive MLC Flash for an enterprise storage application. A page is associated with a set of primary ECC codewords, and a page stripe is associated with a set of secondary codewords and primary over secondary parity, (PoSP) ECC codewords. Two or more page stripes can form a page grid, wherein the page grid is associated with a group of tertiary ECC codewords, wherein the last page stripe of the page grid has a reduced payload capacity.“
The patent application was filed on May 22, 2012 (13/477,635).
Subscribe to our free daily newsletter
