Apparatus and method utilized in personal computer for control of disk drive rate to reduce its noise and vibration

Apparatus for reducing noise and vibrations in a personal computer having at least one disk data-storage device with data reading from or writing to the disk afforded by rotation of the disk at a steady rate that is prescribed by a command drawn from related processing block of the computer, the noise generated by the drive being a monotone non-decreasing function of the rotational rate of a disk drive motor, said apparatus comprising:

• a disk drive provided with the drive motor micro-controller;
• a disk drive control program module;
• a noise/vibration sensor positioned within the zone adjacent the disk drive and measuring the actual level of noise/vibrations generated by the drive;
• a data file that contains for said disk drive a table that lists for each rotation rate of the drive a command to set the disk drive motor to the rate, and also specifies a desired maximum allowable level of noise/vibrations generated by the drive, said disk drive control program generates necessary control command chosen from the said table to set the disk drive motor to the optimal rotation rate, the optimal rate being the highest rotation rate for which the noise/vibration level as measured by the said noise/vibration sensor does not exceeds the maximum allowable noise level as listed in the said data file.

A method for reducing the noise and vibrations in a computer having at least one disk data-storage device with data reading from or writing to the disk afforded by rotation of the disk at a steady rate that is prescribed by a command drawn from related processing block of the computer, the computer being additionally provided with a noise/vibration sensor positioned within the zone adjacent a disk drive and measuring the actual level of noise/vibrations generated by the drive, the method utilizing a data file which contains for said disk drive a table that lists for each rotation rate of the drive a command to set a disk drive motor to the rate, and also specifies a prescribed maximum allowable level of noise/vibrations generated by the drive, said method, after the computer is actuated, comprising the steps of:

• [a] reading, from the said data file, the prescribed maximum allowable level of noise/vibrations generated by the drive;
• [b] continuously measuring the actual level of noise/vibrations generated by the drive with the use of the said noise/vibration sensor positioned within the zone adjacent the disk drive;
• [c] continuously comparing the actual level of noise/vibrations generated by the drive with the prescribed maximum allowable level;
• [d] modifying in a stepwise manner the disk drive rotation rate by generating appropriate commands chosen from the said table to set the disk drive motor to the optimal rotation rate, the optimal rate being the highest rotation rate for which the noise/vibration level as measured by the said noise/vibration sensor does not exceeds the prescribed maximum allowable noise level as red from the said data file.