公开(公告)号：US5057950A

公开(公告)日：1991-10-15

申请号：US295174

申请日：1989-01-06

Applicant: Shinya Ozaki ,  Masaki Yamada ,  Brian A. Milthorp ,  Bruce A. Thompson

Inventor： Shinya Ozaki ,  Masaki Yamada ,  Brian A. Milthorp ,  Bruce A. Thompson

IPC: G11B20/12 ,  G06F3/06 ,  G11B15/02 ,  G11B27/00 ,  G11B27/10 ,  G11B27/30 ,  G11B27/32

CPC classification number: G06F3/0601 ,  G11B15/026 ,  G11B27/107 ,  G11B27/3027 ,  G11B27/3063 ,  G11B27/309 ,  G11B27/328 ,  G06F2003/0698 ,  G11B2220/90 ,  G11B2220/913

Abstract: Before reading/writing a newly loaded data tape, it is known to carry out read/write tests on the tape drive concerned by using a section of the tape set aside for this purpose. This test section is generally marked off by formatting keys which must be accessed and read to identify the test section. In order to facilitate access to the test section, the disclosed data storage method locates the test section in the region of tape between a beginning-of-media BOM position and a beginning-of-recording BOR position with the latter being at a known distance from BOM. As a result, it is possible to rely simply on displacement measurement to access the test section from BOM. As a precaution, a check can be made for possible overshoot error in the tape positioning means so as to avoid testing being carried out beyond BOR.