Dynamic magnetic information storage or retrieval – General processing of a digital signal
Reexamination Certificate
2006-11-07
2006-11-07
Young, Wayne (Department: 2627)
Dynamic magnetic information storage or retrieval
General processing of a digital signal
C360S048000, C360S029000
Reexamination Certificate
active
07133228
ABSTRACT:
Method and apparatus for transferring data to and from a data storage medium, such as a rotatable disc in a data storage device. The medium includes a data sector field with a physical length sufficient to store a first data block at a first write frequency. A compression engine compresses the first data block to provide a reduced size, compressed data block. The compressed data block is then written to the data sector field at a second write frequency less than the first write frequency so that the written compressed data block occupies substantially the physical length of said data sector field. This achieves a decreased linear bit density and tends to increase communication channel signal to noise (SNR) ratios and reduce error rates. Data slipping is further advantageously employed so that the first data block further stores at least a portion of a second compressed data block.
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Dalton David G.
Fung Kendall H.
Warren Robert W.
Fellers , Snider, et al.
Mercedes Dismery
Seagate Technology LLC
Young Wayne
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