Patent Number: 8,719,668

Title: Non-volatile storage system compensating prior probability for low-density parity check codes

Abstract: Provided in one embodiment is a nonvolatile storage system having multiple nonvolatile storage media and a controller coupled to the multiple nonvolatile storage media. The controller has a storage area configured to store management information including probability management information denoting error probability information of a unit physical area in a nonvolatile storage medium, and an error correcting circuit configured to carry out coding and decoding by a low density parity check code. The controller, in a data read process, is configured to identify based on management information an error probability, uses the identified error probability to correct the read data using the error correcting circuit.

Inventors: Hashimoto; Akiyoshi (Kawasaki, JP), Suzuki; Akifumi (Yokohama, JP), Tsunehiro; Takashi (Ebina, JP)

Assignee: Hitachi, Ltd.

International Classification: H03M 13/00 (20060101); G06F 11/00 (20060101); G11C 29/00 (20060101)

Expiration Date: 5/06/12018