Method and apparatus for optimizing skip mask operations in...

Details Method and apparatus for optimizing skip mask operations in... Method and apparatus for optimizing skip mask operations in...

2005-03-15

2005-03-15

Robertson, David L. (Department: 2186)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C360S077020

Reexamination Certificate

active

06868477

ABSTRACT:
A skip mask mechanism is implemented in a disc drive in order to increase performance by minimizing the number of necessary disc rotations required while executing a set of pseudo-sequential commands. The drive includes an interface between the host computer and the drive, a read/write channel between the interface and the transducer/head, a formatter between the interface and the read/write channel for timing when data is transferred between the interface and the read/write channel, and a skip mask mechanism interposed between a target calculator and the formatter that provides a masked input to the formatter for controlling passage of data between the interface and the read/write channel.

REFERENCES:
patent: 5276662 (1994-01-01), Shaver, Jr. et al.
patent: 5835930 (1998-11-01), Dobbek
patent: 5983309 (1999-11-01), Atsatt et al.
Method, System and Interface for Mapping Tracks in No-ID Disk Drives, IBM TDB vol. 38, No. 12, Dec. 1995, pp. 275-277.*
Automated Hardware Processing of Direct Access Storage Device Skip Masks, IBM TDB vol. 39, No. 05, May 1996, pp. 121-122.*
Skip Mask Operation in a No-ID Disk Drive, IBM TDB vol. 39, No. 06, Jun. 1996, pp. 47-50.

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