(Copyright 2009 – Kevin Rouviere)
This is an idea I’ve had for awhile, and while I don’t have a working system based on this idea, I can illustrate the principles.
– Maintain high recording density
– Dramatically reduce power consumption
– Instant start/stop of data storage device
The storage device can be built using conventional hard drive technology, with minimal changes to the mechanics. The spindle motor is replaced with a servo motor to provide precise angular positioning of the platters. The head actuator is then used to sweep the head back and forth across the platters, to create relative motion between the read/write head and the recording medium. The read/write head would be rotated to provide proper alignment of the head with the recording tracks. The recording tracks would not be circular as in a conventional hard drive, but would rather be stripes extending from the innermost portion of the platter near the hub, toward the outer edge of the platter.
Using this technique, the economical method of storing data on hard drive platters could be combined with very low power consumption when the drive is not in use, because the platters would not need spin, other than to provide the correct angular position of the platters under the read/write head. When data storage or retrieval is needed, rapid startup may be achieved due to the short time needed to engage the read/write head actuator.
Elements of the experiment – An old hard drive, Stepper motor (to drive spindle), wires soldered to voice coil.
Short clip showing approximation of how device would work. Platter can remain motionless while voice coil provides required head velocity to read/write the platter.