Seek optimization for disk files with side-by-side head

Details Seek optimization for disk files with side-by-side head Seek optimization for disk files with side-by-side head

1996-12-13

1998-08-11

Edun, Muhammad N.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 61, 360 7801, G11B 2102

Patent

active

057935556

ABSTRACT:
Method and apparatus are disclosed for a data recording disk file having a head module with separate side by side read and write transducers for optimizing the switching of the head between reading information and writing information on the same track or cylinder. A function generator defines at least one control function for a servo control signal to drive an actuator to move the head module the approximate distance between the side by side write and read transducers, optimized to minimize the time between write and read, and optimized to move the head module the approximate distance between the side by side read and write transducers at the timing best suited to minimize the write transition time. The disclosed method and apparatus additionally comprises defining at least one family of control functions, the family of functions optimized to account for the latency time between write and read for selected angular distances (skew) between the ending of the data being written and the start of the data to be read, and vice versa.

REFERENCES:
patent: 4439800 (1984-03-01), Powell
patent: 4679103 (1987-07-01), Workman
patent: 4894599 (1990-01-01), Ottesen et al.
patent: 5218496 (1993-06-01), Kaczeus
patent: 5229901 (1993-07-01), Mallary
patent: 5268804 (1993-12-01), Wallis
patent: 5331492 (1994-07-01), Komai et al.
patent: 5459624 (1995-10-01), Erickson et al.

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