Resources Contact Us Home
Disk memory device

Image Number 2 for United States Patent #5111345.

A disk memory device is provided that will maximize the storage capacity of a memory disk while at the same time maximize the record and playback data rate. Two recording disks are mounted upon a common shaft that is rotated at a fixed speed. Each disk has a recording area including a surface upon which data can be recorded/read in the form of tracks arranged either in concentric tracks or in a spiral. The recording area surfaces are divided into multiple concentric track groups. Two read/write heads and two head positioning servos (including electronic controls) are mounted such that each disk recording surface can be read out or written by the read/write heads. Each track of the multiple track groups of the first disk are given designated numbers beginning with the outer track of the outermost or edge track group and continuing in higher consecutive numbers until the inner track of the innermost track group is designated. However, each track of the multiple track groups of the second disk are given designated numbers in the exact reverse order of the first disk, such that the combined length of a track from the first disk, when added to the length of the same numbered track of the second disk is a constant, generating a constant data rate for the disk memory device.

  Recently Added Patents
Method and apparatus for using service capability information for user plane location
System and method for providing definitions
Methods and systems for time-shifting content
Apparatus and methods for color displays
Method and apparatus for wireless transmission of diagnostic information
System and method of improving audio signals for the hearing impaired
Wireless communication method, wireless communication system, and mode switching method
  Randomly Featured Patents
Ligand binding stabilization method for drug target identification
Board mounted electrical connector
Image processing apparatus, image processing method, and program
Constraint stiffener design
N-arylsulfonylamino acid omega-amides
Fault resilient boot circuit using ring counter
System for injection through or into the human skin
System and method for controlling communication-executable refrigerator
Gas-insulated switchgear
Synthesis of conjugated eicosadienoic acid