Head disk assembly simulator

Details Head disk assembly simulator Head disk assembly simulator

1992-05-21

1995-04-04

Eng, David Y.

Boots, shoes, and leggings

364578, 3642323, 36492781, G06F 9455

Patent

active

054044928

ABSTRACT:
An embodiment of the present invention is a head disk assembly (HDA) simulator that outputs a flexible, totally electronic simulation of an HDA. It outputs a programmable standard HDA signal. As such the HDA simulator generates the head signal that a functioning, already servo-written HDA would provide. This signal can be ideal, eliminating any anomalies and inconsistencies inherent in electromechanical devices. Quantifiable amounts of anomalies can be systematically introduced to allow design margin testing. The HDA simulator is controlled in two ways. First, by allowing a user to choose items from four menus. And second, by allowing the user to use a built-in text editor to edit ASCII files that control the servo patterns and simulator operation. Independent channels of repetitive signals are available to specify sync, servo and data patterns. For any given simulated head position, simulated adjacent tracks are generated and then mixed-in at an appropriate ratio. Signals that are unique to each track are also available, to accommodate special requirements such as Grey code.

REFERENCES:
patent: 4727512 (1988-02-01), Birkner et al.
patent: 5070474 (1991-12-01), Tuma et al.
patent: 5226168 (1993-07-01), Kobayashi et al.
Ruiz et al; A Numerical Simulation of the Head-Disk Assembly in Magnetic Hard Disk Files; ASME Journal of Tribology; vol. 112; Parts I, II; pp. 593-613; Oct. 1990.
Shih et al; Modeling and Design Analysis of a Workstation LAN Server; 1991 International Symp. on VLSI Technology; May 22, 1991; pp. 329-333.
Williams; Monte Carlo Simulation of Thin Film Head Read-Write Performance; IEEE Transactions on Magnetics, vol. 26, No. 6, Nov. 1990 pp. 3022-3026.
Cha et al.; Numerical Simulation and Animation of Head Disk Assembly Dynamics; IEEE Trans. on Mag., vol. 27, No. 6, Nov. 1991, pp. 5136-5138.
Hermann; Volterra Modeling of Digital Magnetic Saturation Recording Channels; IEEE Trans. on Mag., vol. 26, No. 5, Sep. 1990, pp. 2125-2127.

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