Data byte fields and corresponding ECC byte fields to be magnetically recorded as multi-byte records is randomized prior to run-length encoding. The randomized/encoded data is then written. When the randomized/encoded data is read back, the data is first decoded, and then derandomized in a complementary...http://www.google.es/patents/US4993029?utm_source=gb-gplus-sharePatente US4993029 - Method and apparatus for randomizing data in a direct access storage device
Method and apparatus for randomizing data in a direct access storage device
