ApplicationNo. 06/853194 filed on 04/17/1986
US Classes:360/31, MONITORING OR TESTING THE PROGRESS OF RECORDING324/212Dynamic information element testing
ExaminersPrimary: Canney, Vincent P.
Attorney, Agent or Firm
International ClassesG11B 27/36 (20060101)
G11B 20/18 (20060101)
G01R 33/12 (20060101)
AbstractA completely automated apparatus for disk certification which has a very high volume production per unit area of square footage required. Volumes of 108 million disks per year require only 1200 square feet of facility, about 3% of the space required for the prior art certification systems. The apparatus uses standard unmodified disk drives and is completely integrated with a conveyor and pickup system for automatic loading and unloading of diskettes. A method of sequencing operations on a disk is disclosed whereby all tracks of disk are written to provide a first test signal. Then all tracks are read after all tracks are written to provide a first read signal. Calculations are performed on the first read signal to obtain a calculated signal and the calculated signal is compared with a known standard. By writing an entire disk before reading the entire disk, rather than writing and reading on a track by track basis, operations on several disk drives can be sequenced to be performed simultaneously while using the same measurement electronics as would be required for one drive.
Field of SearchMONITORING OR TESTING THE PROGRESS OF RECORDING