Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data in specific format
Patent
1996-08-14
1999-12-28
Kim, W. Chris
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Data in specific format
G11B 509
Patent
active
060089601
ABSTRACT:
A method and apparatus for generating very small split tables from an even smaller amount of information preferably stored on a medium in a system track. The present invention takes advantage of the fact that the pattern of split data cells is periodic. Each split table can be generated upon initial application of power from a relatively few parameters stored in the system track. A method is provided by the present invention for generating each split table based upon the zone number, the number of track wedges within the period of the repeat pattern, the rate at which data is to be written in the zone and two additional parameters. In addition, the present invention is a method and apparatus for increasing the efficiency of the medium by adjusting the size of each zone to minimize the number of split data cells stored on the medium. In accordance with the present invention, the size of each zone is selected based upon the length of the repeat pattern. Therefore, in accordance with the present invention, the size of each zone is preferably optimized in order to optimize the efficiency with which data can be stored on the medium. The present invention also allows the organization of zones to be optimized for each particular format of the DASD, thus allowing the particular format of the DASD to be changed without significantly reducing the efficiency with which data is stored on the medium. Also, equalizer sub-zones are defined.
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International Business Machines - Corporation
Kim W. Chris
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