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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：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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公开(公告)号：DE69120757D1
公开(公告)日：1996-08-14
申请号：DE69120757
申请日：1991-09-16
Applicant: IBM
Inventor： KULAKOWSKI JOHN EDWARD , MEANS RODNEY JEROME , TAYEFEH MOROVAT
IPC: G11B7/00 , G11B7/0045 , G11B7/0055 , G11B7/007 , G11B7/013 , G11B11/10 , G11B11/105 , G11B20/12
Abstract: The present invention relates to a re-writable data storage member (10) comprising a plurality of spaced apart addressable data storage areas (12) for recording and storing data and a plurality of non-data storage areas (15) interposed between adjacent ones of the addressable data storage areas for recording signals not representing data, the storage member being adapted to be scanned in a direction over the storage areas. According to the invention the storage member is characterised in that one of the addressable data storage areas contains first machine readable indicia indicating that the storage member contains data which is not to be changed from any original recording of the data, another of the addressable data storage areas contains second machine readable indicia indicating whether or not the storage member has been erased of data in its entirety, and each of the non-data storage areas contains third machine readable indicia indicating whether or not one of the respective adjacent addressable data storage areas can be written into. The invention also relates to a data storage system comprising a re-writable data storage member as above and to a method of operating such a data storage system.
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25.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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Patent Agency Ranking
公开(公告)号：DE69114437D1
公开(公告)日：1995-12-14
申请号：DE69114437
申请日：1991-09-30
Applicant: IBM
Inventor： KULAKOWSKI JOHN EDWARD , MEANS RODNEY JEROME , STEPHENS GARY RAYMOND
IPC: G11B7/0037 , G11B7/004 , G11B11/105 , G11B19/02 , G11B19/06 , G11B7/00 , G11B11/10
Abstract: The present invention relates to data storage apparatus comprising a removable data storage medium, first control means for initially "powering on" the apparatus and for enabling the apparatus to receive a data storage medium, mode setting means for setting the apparatus into an "operate" mode state or a "non-operate" mode state, means for receiving commands to perform operations in connection with the data storage medium, and second control means for controlling the operation of the apparatus on receipt of the commands. According to the invention the apparatus is characterised in that the mode setting means sets the apparatus into a "non-operate" mode state on operation of the first control means to "power on" the apparatus or to enable the apparatus to receive a storage medium, and the second control means, on receipt of a command, checks the mode state (132) and performs operations as follows: (a) if the mode state is "non-operate", (i) checks to see if the received command is a "Mode Set" command (140), (ii) if the received command is not a "Mode Set" command, rejects said command (141), and (iii) if the received command is a "Mode Set" command, sets the mode state to "operate", and (b) if the mode state is "operate" causes performance of the received command (142).
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公开(公告)号：DE3883316T2
公开(公告)日：1994-03-17
申请号：DE3883316
申请日：1988-05-19
Applicant: IBM
Inventor： KULAKOWSKI JOHN EDWARD , MEANS RODNEY JEROME
Abstract: A data recorder, preferably of the magnetooptic type, employs a rotating record storage disk (30). The record storage disk has a track starting primary data storing sector circumferentially adjacent to the track starting sector or a small plurality of alternate data storing sectors which are not addressable directly by mechanisms outside of the recorder as are the primary recording sectors. Whenever a one of the primary sectors in a given track is found to be defective, then one of the alternate sectors in that same track receives data from a one of the primary storing records of sectors in the same track. A small number of alternate sectors are selected to extend circumferentially for creating an elapsed scan time over the element of sectors not less than the elapsed time required for the recorder to switch from scanning one track to scanning an adjacent one of the tracks. In a magnetooptic recorder, the elapsed time selected for scanning the small plurality of alternate sectors is also not less than the time to reverse the magnetic biasing field for erasing and recording on the disk. Alternate sectors provide both for alternate data storage and for the preparatory steps of track jumping or switching and magnetic field bias reversal. Second alternate ones of the tracks are selected in the event all of the alternate sectors in a given track are filled with data from defective ones of the primary sectors in the same track as the alternate sectors.
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公开(公告)号：AU2651188A
公开(公告)日：1989-08-10
申请号：AU2651188
申请日：1988-12-02
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：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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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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