公开(公告)号：DE3689532D1

公开(公告)日：1994-02-24

申请号：DE3689532

申请日：1986-04-11

Applicant: IBM

Inventor： KULAKOWSKI JOHN EDWARD ,  MEANS RODNEY JEROME

IPC: G06F3/06 ,  G06F3/08 ,  G06F13/10 ,  G06F13/12 ,  G11B7/00 ,  G11B7/004

Abstract: A data recorder employs a disk record having a spiral track with either magnetically or optically sensible indicia. A normal mode of operation is to repeatedly scan one turn or circumvolution of the spiral track for emulating a circular­ly closed track. The recorder responds to received commands from a utilization device to tailor the disk access and recovery operations to the received command based upon command parameters and current status of the disk record. Electrical circuit and programming arrangements for effect­ing the controls are disclosed.