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Determining the Type and Characteristics of a Disk Drive Installed in a System Disclosure Number: IPCOM000062398D
Original Publication Date: 1986-Nov-01
Included in the Prior Art Database: 2005-Mar-09

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Richardson, WC Williams, JS [+details]


By having the manufacturer write a configuration record on its disk drive at a fixed location, the system can read this information and use it for the operation of the drive. In a system that may have different disk drives installed, it is necessary for the system to determine the types of drives installed and their characteristics in order to operate them. It is difficult but possible to do this using a trial and error method of attempting to read on different heads and cylinders. The trial and error approach is not fail-safe because the system cannot tell the difference between the end of a cylinder or a defective head on the cylinder. The solution to this problem is to have the manufacturer write a configuration record on the disk drive at a fixed location.