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公开(公告)号：DE3856090D1
公开(公告)日：1998-02-05
申请号：DE3856090
申请日：1988-03-23
Applicant: IBM
IPC: G06F12/00 , G06F3/06 , G06F17/30 , G11B7/007 , G11B20/12 , G11B20/18 , G11B27/28 , G11B27/32 , G11B7/013
Abstract: An updatable and expandable directory structure and resultant access procedures emulating a write-once or indelible record medium (20) to a rewriteable record medium as to accessing characteristics. The directory is indexed; one directory header for a first set of files indexes another set of files. Sector clusters or data extents are managed such that random recording from any file proceeds independently of write-once characteristics. The directory is stored on the medium as data is recorde. Each directory entry contains an archival history of recording of a related data file in the medium. Both logical and physical addressing is employable.
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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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Patent Agency Ranking
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公开(公告)号：SG150194G
公开(公告)日：1995-03-17
申请号：SG150194
申请日：1994-10-17
Applicant: IBM
Inventor： KULAKOWSKI JOHN EDWARD , MEANS RODNEY JEROME
Abstract: A large capacity data storing disk includes a volume table of contents (VTOC) which identifies allocated ones of data storage tracks and identification of the data contents therein, indications of unallocated data storage track and an indication of which of the data storage tracks on the large capacity disk surface are unformatted. The indications may also include indications of unallocated "erased" tracks that do not contain data residuals from previous recordings. Those unallocated tracks having such erased condition in a count key data record format (CKD) require a home address record on each of the formatted tracks. The home address record may include indications of rotational position of defects to be skipped over during the recording and readback operations. A specific embodiment of the invention using a magnetooptic record medium is described.
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公开(公告)号：HK137994A
公开(公告)日：1994-12-16
申请号：HK137994
申请日：1994-12-08
Applicant: IBM
Inventor： KULAKOWSKI JOHN EDWARD , MEANS RODNEY JEROME
Abstract: A large capacity data storing disk includes a volume table of contents (VTOC) which identifies allocated ones of data storage tracks and identification of the data contents therein, indications of unallocated data storage track and an indication of which of the data storage tracks on the large capacity disk surface are unformatted. The indications may also include indications of unallocated "erased" tracks that do not contain data residuals from previous recordings. Those unallocated tracks having such erased condition in a count key data record format (CKD) require a home address record on each of the formatted tracks. The home address record may include indications of rotational position of defects to be skipped over during the recording and readback operations. A specific embodiment of the invention using a magnetooptic record medium is described.
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公开(公告)号：ES2056199T3
公开(公告)日：1994-10-01
申请号：ES89300172
申请日：1989-01-10
Applicant: IBM
Inventor： KULAKOWSKI JOHN EDWARD , MEANS RODNEY JEROME
Abstract: A large capacity data storing disk includes a volume table of contents (VTOC) which identifies allocated ones of data storage tracks and identification of the data contents therein, indications of unallocated data storage track and an indication of which of the data storage tracks on the large capacity disk surface are unformatted. The indications may also include indications of unallocated "erased" tracks that do not contain data residuals from previous recordings. Those unallocated tracks having such erased condition in a count key data record format (CKD) require a home address record on each of the formatted tracks. The home address record may include indications of rotational position of defects to be skipped over during the recording and readback operations. A specific embodiment of the invention using a magnetooptic record medium is described.
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公开(公告)号：DE68915800D1
公开(公告)日：1994-07-14
申请号：DE68915800
申请日：1989-01-10
Applicant: IBM
Inventor： KULAKOWSKI JOHN EDWARD , MEANS RODNEY JEROME
Abstract: A large capacity data storing disk includes a volume table of contents (VTOC) which identifies allocated ones of data storage tracks and identification of the data contents therein, indications of unallocated data storage track and an indication of which of the data storage tracks on the large capacity disk surface are unformatted. The indications may also include indications of unallocated "erased" tracks that do not contain data residuals from previous recordings. Those unallocated tracks having such erased condition in a count key data record format (CKD) require a home address record on each of the formatted tracks. The home address record may include indications of rotational position of defects to be skipped over during the recording and readback operations. A specific embodiment of the invention using a magnetooptic record medium is described.
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