Hard and Soft Disk/Diskette Drives Powering Under Control of MICROCODE to Reduce Drive Failures
Original Publication Date: 1988-Jun-01
Included in the Prior Art Database: 2005-Feb-15
This article describes the hardware and the associated microcode architecture which allows disk/diskette drives to be powered ON/OFF under control of microcode. An application of the invention will be used by the service processor, of a control unit which is always powered ON. The disk/diskette power-on time is reduced from 700 hours per month to a maximum of 30 hours per month. (Image Omitted) The mechanism described in this article solves the reliability problem of mass storages, such as hard disk(s) and/or diskette(s) drive(s). Due to mechanical parts, the Mean Time Between Failure (MTBF) is 20,000 hours for high-end hard disks and 15,000 hours for diskette drives. Compared to electronic components which have an MTBF around 60,000 hours, there is a ratio of 3 for hard disk and 4 for diskette drives.