公开(公告)号：DE3377307D1

公开(公告)日：1988-08-11

申请号：DE3377307

申请日：1983-09-15

Applicant: IBM

Inventor： LOVGREN JEFFREY ,  PLUMMER WILLIAM BRYAN

IPC: G06F3/06 ,  G11B5/016 ,  G11B19/04 ,  G11B20/12 ,  G11B27/10 ,  G11B5/09

Abstract: A diskette identifying code is written in each sector on a flexible disk used in a flexible disk recorder. The diskette identifying code can be read from any track on the flexible disk and used to log the occurrence of insertion or removal of the diskette at the flexible disk recorder. Also, the diskette identifying code can be read from any accessed track prior to a write operation on that track in order to verify that the diskette has not been changed by the operator since the last access to the flexible disk.