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公开(公告)号：DE69511730T2
公开(公告)日：2000-04-06
申请号：DE69511730
申请日：1995-12-07
Applicant: IBM
Inventor： KULAKOWSKI JOHN EDWARD , MCDOWELL JUDSON ALLEN , RUBIN KURT ALLAN
IPC: G11B7/00 , G11B7/0045 , G11B7/0055 , G11B7/007 , G11B7/125 , G11B11/105 , G11B20/18 , G11B7/013 , G11B20/12
Abstract: The present invention provides efficient management of calibration and spare sectors on a banded optical write-once, read-many (WORM) disk. A portion of each band on the disk includes a user data area and a reserved area. Sectors in the reserved area are usable either as spare sectors, replacing defective sectors in the user area, or as calibration sectors, for use when the laser write-power level is calibrated. Sectors preferably are used for sparing from one end of the reserved area while sectors are used for calibration from the opposite end. A common overflow reserved area can also be provided for use if all of the sectors in one or more primary reserved areas associated with any of the bands have been exhausted.
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公开(公告)号：DE69511730D1
公开(公告)日：1999-09-30
申请号：DE69511730
申请日：1995-12-07
Applicant: IBM
Inventor： KULAKOWSKI JOHN EDWARD , MCDOWELL JUDSON ALLEN , RUBIN KURT ALLAN
IPC: G11B7/00 , G11B7/0045 , G11B7/0055 , G11B7/007 , G11B7/125 , G11B11/105 , G11B20/18 , G11B7/013 , G11B20/12
Abstract: The present invention provides efficient management of calibration and spare sectors on a banded optical write-once, read-many (WORM) disk. A portion of each band on the disk includes a user data area and a reserved area. Sectors in the reserved area are usable either as spare sectors, replacing defective sectors in the user area, or as calibration sectors, for use when the laser write-power level is calibrated. Sectors preferably are used for sparing from one end of the reserved area while sectors are used for calibration from the opposite end. A common overflow reserved area can also be provided for use if all of the sectors in one or more primary reserved areas associated with any of the bands have been exhausted.
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公开(公告)号：CA2168286A1
公开(公告)日：1996-10-01
申请号：CA2168286
申请日：1996-01-29
Applicant: IBM
Inventor： KULAKOWSKI JOHN EDWARD , MCDOWELL JUDSON ALLEN , RUBIN KURT ALLAN
IPC: G11B7/00 , G11B7/0045 , G11B7/0055 , G11B7/007 , G11B7/125 , G11B11/105 , G11B20/18
Abstract: The present invention provides efficient management of calibration and spare sectors on a banded optical write-once, read-many (WORM) disk. A portion of each band on the disk includes a user data area and a reserved area. Sectors in the reserved area are usable either as spare sectors, replacing defective sectors in the user area, or as calibration sectors, for use when the laser write-power level is calibrated. Sectors preferably are used for sparing from one end of the reserved area while sectors are used for calibration from the opposite end. A common overflow reserved area can also be provided for use if all of the sectors in one or more primary reserved areas associated with any of the bands have been exhausted.
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公开(公告)号：DE3669801D1
公开(公告)日：1990-04-26
申请号：DE3669801
申请日：1986-06-19
Applicant: IBM
Inventor： BLANCO ALFRED WARREN , MCDOWELL JUDSON ALLEN , YEARY DAVID ANGELUS
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公开(公告)号：DE2732515A1
公开(公告)日：1978-02-16
申请号：DE2732515
申请日：1977-07-19
Applicant: IBM
Inventor： DEVORE ERNEST WILLIAM , MCDOWELL JUDSON ALLEN
IPC: G11B15/087 , G11B20/12 , G11B27/10 , G11B27/30 , G11B5/02
Abstract: Each data record portion on a record member includes preamble signals for synchronizing recording apparatus with respect to data signals recorded in juxtaposition to the preamble signals. A plurality of beginning of data indicators are interleaved in the synchronizing signals for providing a plurality of independent but coacting beginning of data location pointers. Enhanced apparatus includes means responsive to any one of the location pointers to ensure a reliable start of data indication.
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Patent Agency Ranking
公开(公告)号：AT184417T
公开(公告)日：1999-09-15
申请号：AT93300779
申请日：1993-02-03
Applicant: IBM
IPC: G11B7/00 , G11B7/004 , 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：HK1008608A1
公开(公告)日：1999-07-16
申请号：HK98109358
申请日：1998-07-23
Applicant: IBM
Inventor： KULAKOWSKI JOHN EDWARD , MCDOWELL JUDSON ALLEN , RUBIN KURT ALLAN
IPC: G11B7/00 , G11B7/0045 , G11B7/0055 , G11B7/007 , G11B7/125 , G11B11/105 , G11B20/18 , G11B
Abstract: The present invention provides efficient management of calibration and spare sectors on a banded optical write-once, read-many (WORM) disk. A portion of each band on the disk includes a user data area and a reserved area. Sectors in the reserved area are usable either as spare sectors, replacing defective sectors in the user area, or as calibration sectors, for use when the laser write-power level is calibrated. Sectors preferably are used for sparing from one end of the reserved area while sectors are used for calibration from the opposite end. A common overflow reserved area can also be provided for use if all of the sectors in one or more primary reserved areas associated with any of the bands have been exhausted.
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公开(公告)号：HK1008703A1
公开(公告)日：1999-05-14
申请号：HK98108876
申请日：1998-07-04
Applicant: IBM
IPC: G11B7/004 , G11B7/00 , G11B7/0055 , G11B7/007 , G11B7/24 , G11B7/26 , G11B7/28 , G11B20/12 , G11B27/10 , G11B
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：ID20158A
公开(公告)日：1998-10-15
申请号：ID980434
申请日：1993-02-04
Applicant: IBM
IPC: G11B7/004 , G11B7/00 , G11B7/0055 , G11B7/007 , G11B7/24 , G11B7/26 , G11B7/28 , G11B20/12 , G11B27/10 , G11B27/00
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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20.发明专利
公开(公告)号：NZ245391A
公开(公告)日：1995-12-21
申请号：NZ24539192
申请日：1992-12-07
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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