Disk storage device

Abstract

Abstract PURPOSE:To prevent the lowering of a data transfer rate by providing a controlling means which jumps a defective sector and turns to a next normal sector when a head accesses the defective sector, and after the access of the sectors is finished wholly executes defect processing from the defective sector to a substituting sector, and rearranges access data. CONSTITUTION:Sixteen sectors are provided on one track of a magnetic storage surface, and it is assumed that the fourteen sectors among them are the normal sectors No.0-13 and the two are the substituting sectors S0, S1, and it is assumed that a transfer request is given to the twelve consecutive sectors No.1-12 from a host computer side. At this time, a high speed processor 25 stores a sector number in a memory, but it is blank because substitution is unknown. Here, after allowing a driver to seek the head, shifting the head to the aimed track, reads a sector address and waits the sector No.1 along the rotation of a magnetic disk, reads data and checks the presence of the defect of the sector when the head arrives, and if no defect, stores the data in an FIFO memory 22.

Inventors

• 👤 Seiji Nomura

Bibliographic Details