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An Algorithm to Reduce Disk Damage Resulting from Slider/Disk Contacts During Load/Unload

IP.com Disclosure Number: IPCOM000010441D
Original Publication Date: 2002-Dec-03
Included in the Prior Art Database: 2002-Dec-03
Document File: 1 page(s) / 37K

Publishing Venue

IBM

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

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  An Algorithm to Reduce Disk Damage Resulting from Slider/Disk Contacts during Load/Unload

During load/unload (L/UL) cycles, the slider can contact the disk and cause disk damage, creating debris that can cause disk damage elsewhere on the disk. Resulting debris may also cause head/disk crash. An algorithm can be applied to reduce the potential for disk damage during L/UL cycles by lowering the disk speed if the slider/disk contact rate is over the design point.

The slider/disk contact events can be detected by many methods: capacitance, pzt, resistive, MR sensor, etc. By utilizing any of these or similar methods, the rate of slider/disk contact is monitored. If the rate and/or rate of change of the rate is beyond a specified design point, the loading cycles are carried out at reduced disk speeds.

Disclosed by International Business Machines Corporation