Disk drive having multiple disks accessible by a reduced number of read/write heads

A disk drive comprising a plurality of magnetic recording disks and at least one read/write head for writing data to and reading data from the disks, the disk drive comprising:

• a rotatable center block comprising a vertical axis and a mounting member;
• a first motor attached to the center block for rotating the center block about the vertical axis;
• a first vertical threaded rod positioned in the mounting member;
• a second motor moveable along the vertical threaded rod;
• at least one head suspension arm extending outwardly from the second motor;
• at least one read/write head mounted to a distal end of the at least one head suspension arm;
• wherein the plurality of magnetic disks are arranged in a stack, wherein each disk of the stack comprises at least one disk surface comprising data storage tracks;
• wherein the at least one arm is vertically movable along the vertical threaded rod by the second motor to position the at least one read/write head for accessing data on at least one of the plurality of disks.