Nonvolatile memory controller with error detection for concatenated error correction codes

A nonvolatile memory system comprising:

• a nonvolatile memory storage module storing encoded data comprising an outer error correction code concatenated with an inner error correction code;
• and
• a nonvolatile memory controller coupled to the nonvolatile memory storage module, the nonvolatile memory controller to recover data stored in the nonvolatile memory storage module by decoding the encoded data in the nonvolatile memory storage module using a hard-decision inner error correction code decoding and an outer error correction code decoding and if the encoded data is not successfully decoded by the hard-decision inner error correction code decoding and the outer error correction code decoding, decoding the data in the nonvolatile memory storage module using a soft-decision inner error correction code decoding and the outer error correction code decoding and if the encoded data is not successfully decoded by the soft-decision inner error correction code decoding and the outer error correction code decoding, recovering the data from the nonvolatile memory storage module by performing a redundant array of independent disks (RAID) operation of the encoded data.

A nonvolatile memory controller comprising:

• an error detection and correction module to receive encoded data stored in a nonvolatile memory storage module, the encoded data comprising a low density parity check (LDPC) inner error correction code concatenated with a Bose-Chaudhuri-Hocquenghem (BCH) outer error correction code, the error detection and correction module to recover the data stored in the nonvolatile memory storage module by recovering the data from the nonvolatile memory storage module using a hard-decision LDPC inner error correction code decoding and a BCH outer error correction code decoding and if the encoded data is not successfully decoded by the hard-decision LDPC inner error correction code decoding and the BCH outer error correction code decoding, recovering the data from the nonvolatile memory storage module using a soft-decision LDPC inner error correction code decoding and the BCH outer error correction code decoding;
• and
• a redundant array of independent disks (RAID) control module coupled to the error detection and correction module, the RAID controller to perform a RAID operation to recover the data from the nonvolatile memory storage if the encoded data is not successfully decoded by the soft-decision LDPC inner error correction code decoding and the BCH outer error correction code decoding.