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Method for Moving the Heads of a 5»" Disk Drive to a Dedicated Parking Zone

IP.com Disclosure Number: IPCOM000044533D
Original Publication Date: 1984-Dec-01
Included in the Prior Art Database: 2005-Feb-06
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Keener, DS: AUTHOR

Abstract

A technique is described whereby a standard method is established to cause the read/write heads of a hard file to be positioned in a dedicated parking zone to prevent damage in the event the drive is shipped or moved. The parking zone is an area on the disk where no data is stored. Since the drive capacity, number of heads and the number of cylinders, and head construction may vary, the exact location of the parking zone is also variable. However, the hard file electronics may be constructed such that a seek to a cylinder number is greater than the maximum number of cylinders available on the file. It is interpreted as a seek to the parking zone. Once this seek is interpreted, the file will move the heads to the parking zone, wherever it may be, and may be secured with a head-locking mechanism.

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Method for Moving the Heads of a 5»" Disk Drive to a Dedicated Parking Zone

A technique is described whereby a standard method is established to cause the read/write heads of a hard file to be positioned in a dedicated parking zone to prevent damage in the event the drive is shipped or moved. The parking zone is an area on the disk where no data is stored. Since the drive capacity, number of heads and the number of cylinders, and head construction may vary, the exact location of the parking zone is also variable. However, the hard file electronics may be constructed such that a seek to a cylinder number is greater than the maximum number of cylinders available on the file. It is interpreted as a seek to the parking zone. Once this seek is interpreted, the file will move the heads to the parking zone, wherever it may be, and may be secured with a head-locking mechanism. Further, when a seek is issued while the heads are in the landing zone, the file will release the head-locking mechanism and proceed to the requested track. The system does not need to know which cylinder is used for the parking zone and is therefore adaptable to a variety of file manufacturers and technologies.

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