Magnetic disk storage module with multiple sets of actuator arms for simultaneous read/write operations at different circumferential locations within the disk stack

摘要

A hard disk drive module for providing memory storage for a computer includes a centrally positioned rotatable stack of disks and a plurality of rotary actuator arms mounting magnetic heads for movement radially of the disks to read/write magnetically encoded data on each surface thereof. The actuator arms which extend between adjacent spaced disks are provided by plural-arm assemblies individually pivotally mounted at each of the four corners of the module so that the radial tracking movement of the heads thereon occurs in angularly spaced locations in the disk stack. Each actuator assembly is driven by a drive arm extending at an acute angle with the longitudinal axes of the associated actuator arms so as to minimize the required space on the module for the drive elements.