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1.
公开(公告)号:US5245485A
公开(公告)日:1993-09-14
申请号:US753242
申请日:1991-08-30
IPC分类号: G06F3/06 , G11B5/008 , G11B15/02 , G11B15/087 , G11B15/43 , G11B20/10 , G11B20/12 , G11B23/36 , G11B27/10 , G11B27/13 , G11B27/17 , G11B27/28
CPC分类号: G06F3/0601 , G11B15/087 , G11B20/10 , G11B20/1205 , G11B23/36 , G11B27/107 , G11B27/13 , G11B27/17 , G11B27/28 , G11B5/00878 , G06F2003/0698 , G11B2020/10592 , G11B2020/1087 , G11B2020/10879 , G11B2220/90
摘要: The invention is one or more tape systems which determine the length of tapes mounted therein to assess the thickness of such tapes. A format identifier is written at one of a plurality of locations on the tape depending upon the tape thickness. The format identifier for a relatively thin tape is written further from the leader block than that for a relatively thick tape, thereby avoiding the writing of user data in a region of the tape embossed with wrap deformations. The thickness determination is combined with a determination of the tape format to assess the compatibility of a desired operation on a tape mounted in a tape system therewith. If the operation is not compatible with the tape and the tape system, the tape system will not permit such operation to continue. A method for operating the tape systems is also disclosed, and accounts for various contingencies, such as blank tapes and marginal determinations of tape thickness.