MULTIPLE-RATE CHANNEL ENDEC IN A COMMUTED READ/WRITE CHANNEL FOR DISK STORAGE SYSTEMS

摘要

A sampled amplitude read channel is disclosed for writing data to and reading data from a disk storage medium. A first channel encoder (40) encodes a first j-k bits of a j-bit data block to generate first encoded data (42), and an ECC encoder (14) encodes the first encoded data and a remaining k-bits of the data block (60) to generate ECC redundancy symbols comprising a plurality of bits. A second channel encoder (46) encodes the remaining k-bits of the data block and the ECC redundancy symbols (16) to generate second encoded data (48). The first encoded data and the second encoded data are then output as channel data written to the disk storage medium (22).