Browse Prior Art Database

Rotational Speed Programmed after Drive Assembly

IP.com Disclosure Number: IPCOM000122783D
Original Publication Date: 1998-Jan-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Kibashi, A: AUTHOR [+4]

Abstract

Disclosed is a method to program the rotational speed of a Hard Disk Drive after drive assembly. The manufacturing process writes rotational speed parameters to small non-volatile memory, EEPROM for example, through drive interface bus by a command. When the drive is powered on, drive firmware reads the rotational speed parameters and then starts to spin up disks with the parameters.

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

Rotational Speed Programmed after Drive Assembly

      Disclosed is a method to program the rotational speed of a Hard
Disk Drive after drive assembly.  The manufacturing process writes
rotational speed parameters to small non-volatile memory, EEPROM for
example, through drive interface bus by a command.  When the drive is
powered on, drive firmware reads the rotational speed parameters and
then starts to spin up disks with the parameters.

      By using this method, controlled parts in manufacturing can be
reduced, and the drive assembly process can be common between
products with different rotational speed.

      The Figure shows an example of the manufacturing
process.  Without the method, three parts shall be controlled for
each rotational speed product.  With the method, all parts can be
common and rotational speed is defined on the test process by writing
the parameters to non-volatile memory.