Magnetic disk drive with error correction,申请号US20060516109-传众专利搜索

Magnetic disk drive with error correction

申请公布号：US7885027(B2)

申请号：US20060516109

申请日期：2006.09.05

申请公布日期：2011.02.08

申请人：

HITACHI GLOBAL STORAGE TECHNOLOGIES, NETHERLANDS,B.V.

发明人：KITAMURA NOBUHITO;YOSHIDA HITOSHI;SUMIYA NORIYUKI

分类号：G11B5/09;G11B27/36

主分类号：G11B5/09

摘要：Embodiments of the present invention provide a magnetic disk drive in which the error correction capability of ECC is improved without sacrificing the storage capacity. In one embodiment, a data track adopts a format structure in which no data-to-data gap area is formed in data sectors. When one of the data sectors is updated in a state in which the rotational speed of a magnetic disk does not satisfy specified conditions, a leading end area of a succeeding data sector or a trailing end area of a preceding data sector is overwritten by the data sector. If a read error occurs in the overwritten data sector, ERP steps are executed to perform read retry so that the read error is recovered by means of on-the-fly ECC or erasure correction. In the case of the erasure correction, an erasure pointer equivalent to the maximum number of overwritten bytes is set.