Head disk assembly simulator
US5404492A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 1992 |
| Grant date | Apr 4, 1995 |
| Priority date | — |
| Expiry date | May 21, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/261
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.