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1.发明公开Detection of instantaneous speed variations in a tape drive. 失效Aufspürenvon schnellenGeschwindigkeitsänderungenbei einem Bandantrieb。
公开(公告)号：EP0206766A1
公开(公告)日：1986-12-30
申请号：EP86304717
申请日：1986-06-19
Applicant: IBM
Inventor： BLANCO ALFRED WARREN , MCDOWELL JUDSON ALLEN , YEARY DAVID ANGELUS
CPC classification number: G11B20/10
Abstract: Apparatus and method for detecting short-term speed variations in a reel-to-reel tape drive for use with digital data, comprising counters (132) for generating time windows representing equal numbers of data bits read from the tape, further counters (135) for counting up during one window and down during the next, comparators (136, 137) for comparing the residual count of the up/down counters with preset limits and an error indicator (138, 134) for indicating the condition when the residual count exceeds the permitted bounds. The invention may be practised over a plurality of data tracks, in which case the apparatus includes means (139, 140) for indicating an overall error when an error has been detected on all tracks.
Abstract translation: 用于检测用于数字数据的卷对卷带驱动器中的短期速度变化的装置和方法，包括用于生成表示从带读取的相等数量的数据位的时间窗口的计数器（132），其他计数器（135） 用于在下一个窗口期间向上计数，用于将上/下计数器的剩余计数与预设限值进行比较的比较器（136,137）和用于指示当剩余计数超过的条件的错误指示符（138,134） 允许范围。 本发明可以在多个数据轨道上实施，在这种情况下，该装置包括用于在所有轨道上检测到错误时指示总体错误的装置（139,140）。
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公开(公告)号：ES2136112T3
公开(公告)日：1999-11-16
申请号：ES93300779
申请日：1993-02-03
Applicant: IBM
IPC: G11B7/004 , G11B7/00 , G11B7/0055 , G11B7/007 , G11B7/24 , G11B7/26 , G11B7/28 , G11B20/12 , G11B27/10
Abstract: The present invention relates to a data storage device comprising a circular disc (30), a data storage medium on at least one surface of the disc, a spiral track extending within the storage medium about the axis of the disc, and a plurality of data storage sectors formed on the track. According to the invention the storage device is characterised in that the storage medium is formed with a reference mark (100) extending radially from the axis of the disc, and the data storage sectors are arranged in groups extending along the spiral track, one end of each group of sectors being located adjacent to one of the points of intersection of the reference mark with the spiral track.
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公开(公告)号：DE69313538T2
公开(公告)日：1998-02-26
申请号：DE69313538
申请日：1993-06-29
Applicant: PHILIPS ELECTRONICS NV , IBM
Inventor： BAKX JOHANNES LEOPOLDUS , WEIJENBERGH PAULUS GIJSBERTUS , BELSER KARL ARNOLD , JAQUETTE GLEN ALAN , KULAKOWSKI JOHN EDWARD , MCDOWELL JUDSON ALLEN , MEANS RODNEY JEROME
Abstract: A record carrier having essentially circular tracks concentrically located around a point of rotation. The record carrier is divided into circular zones each having m tracks, where m is an integer. Each track within a zone is subdivided into n sectors, where n is an integer which is constant per zone and which increases as the zone is more remote from the point of rotation. Each sector including a header portion and a data portion. The header portions in the radial direction in each zone are in line. In each zone the condition of m*n=j*k is satisfied, where is j an integer greater than or equal to 2 and is constant for each zone, and k is an integer.
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公开(公告)号：ES2108810T3
公开(公告)日：1998-01-01
申请号：ES93201881
申请日：1993-06-29
Applicant: PHILIPS ELECTRONICS NV , IBM
Inventor： BAKX JOHANNES LEOPOLDUS , WEIJENBERGH PAULUS GIJSBERTUS , BELSER KARL ARNOLD , JAQUETTE GLEN ALAN , KULAKOWSKI JOHN EDWARD , MCDOWELL JUDSON ALLEN
Abstract: A record carrier having essentially circular tracks concentrically located around a point of rotation. The record carrier is divided into circular zones each having m tracks, where m is an integer. Each track within a zone is subdivided into n sectors, where n is an integer which is constant per zone and which increases as the zone is more remote from the point of rotation. Each sector including a header portion and a data portion. The header portions in the radial direction in each zone are in line. In each zone the condition of m*n=j*k is satisfied, where is j an integer greater than or equal to 2 and is constant for each zone, and k is an integer.
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公开(公告)号：DE69326267D1
公开(公告)日：1999-10-14
申请号：DE69326267
申请日：1993-02-03
Applicant: IBM
IPC: G11B7/004 , G11B7/00 , G11B7/0055 , G11B7/007 , G11B7/24 , G11B7/26 , G11B7/28 , G11B20/12 , G11B27/10
Abstract: The present invention relates to a data storage device comprising a circular disc (30), a data storage medium on at least one surface of the disc, a spiral track extending within the storage medium about the axis of the disc, and a plurality of data storage sectors formed on the track. According to the invention the storage device is characterised in that the storage medium is formed with a reference mark (100) extending radially from the axis of the disc, and the data storage sectors are arranged in groups extending along the spiral track, one end of each group of sectors being located adjacent to one of the points of intersection of the reference mark with the spiral track.
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Patent Agency Ranking
公开(公告)号：DE69313538D1
公开(公告)日：1997-10-09
申请号：DE69313538
申请日：1993-06-29
Applicant: PHILIPS ELECTRONICS NV , IBM
Inventor： BAKX JOHANNES LEOPOLDUS , WEIJENBERGH PAULUS GIJSBERTUS , BELSER KARL ARNOLD , JAQUETTE GLEN ALAN , KULAKOWSKI JOHN EDWARD , MCDOWELL JUDSON ALLEN , MEANS RODNEY JEROME
Abstract: A record carrier having essentially circular tracks concentrically located around a point of rotation. The record carrier is divided into circular zones each having m tracks, where m is an integer. Each track within a zone is subdivided into n sectors, where n is an integer which is constant per zone and which increases as the zone is more remote from the point of rotation. Each sector including a header portion and a data portion. The header portions in the radial direction in each zone are in line. In each zone the condition of m*n=j*k is satisfied, where is j an integer greater than or equal to 2 and is constant for each zone, and k is an integer.
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公开(公告)号：DE69124651T2
公开(公告)日：1997-07-17
申请号：DE69124651
申请日：1991-08-28
Applicant: IBM
Inventor： KULAKOWSKI JOHN EDWARD , MCDOWELL JUDSON ALLEN , MEANS RODNEY JEROME
IPC: G11B7/00 , G11B7/0045 , G11B7/0055 , G11B20/12 , G11B20/18 , G11B27/36
Abstract: The present invention relates to an optical disk data storage system having an optical data storage member with a multiplicity of data storage locations and comprising signal transfer means for optically sensing data recorded in a first storage location on the storage member including error detecting and correcting means for correcting sensed data to corrected data and means for establishing and measuring acceptability criteria of the data sensing, means for establishing a high threshold of acceptability criteria for sensed data, means for comparing the measured acceptability criteria with the established high threshold for determining whether the measured acceptability criteria meet the high threshold, and means for detecting that the measured acceptability high threshold is not acceptable and then for activating the signal transfer means for recording the sensed data at a second data storage location on said storage member.
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公开(公告)号：DE69124651D1
公开(公告)日：1997-03-27
申请号：DE69124651
申请日：1991-08-28
Applicant: IBM
Inventor： KULAKOWSKI JOHN EDWARD , MCDOWELL JUDSON ALLEN , MEANS RODNEY JEROME
IPC: G11B7/00 , G11B7/0045 , G11B7/0055 , G11B20/12 , G11B20/18 , G11B27/36
Abstract: The present invention relates to an optical disk data storage system having an optical data storage member with a multiplicity of data storage locations and comprising signal transfer means for optically sensing data recorded in a first storage location on the storage member including error detecting and correcting means for correcting sensed data to corrected data and means for establishing and measuring acceptability criteria of the data sensing, means for establishing a high threshold of acceptability criteria for sensed data, means for comparing the measured acceptability criteria with the established high threshold for determining whether the measured acceptability criteria meet the high threshold, and means for detecting that the measured acceptability high threshold is not acceptable and then for activating the signal transfer means for recording the sensed data at a second data storage location on said storage member.
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公开(公告)号：AU664061B2
公开(公告)日：1995-11-02
申请号：AU3100493
申请日：1993-01-04
Applicant: IBM
IPC: G11B7/00 , G11B7/004 , G11B7/0055 , G11B7/007 , G11B7/24 , G11B7/26 , G11B7/28 , G11B20/12 , G11B27/10 , G11B7/013
Abstract: The present invention relates to a data storage device comprising a circular disc (30), a data storage medium on at least one surface of the disc, a spiral track extending within the storage medium about the axis of the disc, and a plurality of data storage sectors formed on the track. According to the invention the storage device is characterised in that the storage medium is formed with a reference mark (100) extending radially from the axis of the disc, and the data storage sectors are arranged in groups extending along the spiral track, one end of each group of sectors being located adjacent to one of the points of intersection of the reference mark with the spiral track.
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公开(公告)号：DE69326267T2
公开(公告)日：2000-04-20
申请号：DE69326267
申请日：1993-02-03
Applicant: IBM
IPC: G11B7/004 , G11B7/00 , G11B7/0055 , G11B7/007 , G11B7/24 , G11B7/26 , G11B7/28 , G11B20/12 , G11B27/10
Abstract: The present invention relates to a data storage device comprising a circular disc (30), a data storage medium on at least one surface of the disc, a spiral track extending within the storage medium about the axis of the disc, and a plurality of data storage sectors formed on the track. According to the invention the storage device is characterised in that the storage medium is formed with a reference mark (100) extending radially from the axis of the disc, and the data storage sectors are arranged in groups extending along the spiral track, one end of each group of sectors being located adjacent to one of the points of intersection of the reference mark with the spiral track.
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