-
公开(公告)号：HK1015934A1
公开(公告)日：1999-10-22
申请号：HK99100877
申请日：1999-03-02
Applicant: IBM
Inventor： ASTHANA PRAVEEN , KULAKOWSKI JOHN EDWARD
IPC: G11B7/00 , G11B20/12 , G11B7/004 , G11B7/0045 , G11B20/18 , G11B27/034 , G11B27/32 , G11B27/36 , G11B
Abstract: Methods for recording information onto CD-Recordable and CD-Erasable optical disks are provided. In a first embodiment, after a session or packet of data is recorded, it is verified to detect unrecoverable errors. If no such errors are present, the session or packet is fixed and recording ends. If an unrecoverable error is detected, the session or packet is re-recorded in an area of the disk immediately following the originally recorded area. When the recorded data is verified as being readable, the session or packet is fixed by recording lead-in and lead-out areas on the disk and by updating a table of contents with the location of the verified data and not the originally recorded data. In a second embodiment, the data is checked as it is recorded. If a defect is suspected, recording halts and the presence of the defect is verified. If a defect is present, the data is re-recorded in an area of the disk immediately following the originally recorded area. When the data is verified as being readable, the session or packet is fixed and recording ends.
-
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.
-
公开(公告)号：ES2090251T3
公开(公告)日：1996-10-16
申请号：ES91308436
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.
-
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.
-
公开(公告)号：CA2046705C
公开(公告)日：1995-09-26
申请号：CA2046705
申请日：1991-07-10
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 , G11B27/19
Abstract: Rewriteable media, such as magnetooptic record members or disk has its recording controlled such that the recording is certifiable as meeting write once read many characteristics. Controls are introduced for the entire disk for indicating that the rewriteable disk is to be used for certified or vault writing, at least in some radial zones of the disk. Recording or writing operations are limited to those addressable areas on the certifiable rewriteable medium that have not been previously written. Each of the addressable areas of the medium, in a disk termed, sectors, have a precursor portion called a control area which indicates the status of the sector and is used for preventing overwriting or erasure as well as controlling.
-
Patent Agency Ranking
公开(公告)号：AU610666B2
公开(公告)日：1991-05-23
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.
-
公开(公告)号：GB2353393B
公开(公告)日：2003-01-22
申请号：GB0014631
申请日：2000-06-16
Applicant: IBM
Abstract: A bit is provided in each Digital Video Disk memory sector header to indicate the type of information contained in the main data portion of the frame. A vector of video clips are stored on the DVD disk and the DVD drive examines the bit to determine whether to play a movie or to employ logic provided by the present invention that allows the DVD drive to determine which included video clip to play instead. The video clips may include cartoons, commercials, movie previews, etc. and the logic employed by the DVD drive allows for random or specific selections to be played at predetermined times, such as displaying a clip during the flipping process of a dual-sided DVD disk. Additionally, the method and apparatus may be applied to DVD disks to determine whether commercials are played before, after or during the movie or the movie is played commercial free.
-
公开(公告)号：DE69622362D1
公开(公告)日：2002-08-22
申请号：DE69622362
申请日：1996-11-26
Applicant: IBM
Inventor： GREEN JR , KULAKOWSKI JOHN EDWARD , MEANS RODNEY JEROME
IPC: G11B7/004 , G11B7/007 , G11B19/04 , G11B19/12 , G11B20/00 , G11B20/18 , G11B27/00 , G11B27/034 , G11B27/10 , G11B27/30 , G11B27/32
Abstract: A unique and permanent identifier is provided for removable media. The identifier is preferably recorded in a previously unused or reserved portion of the media and can be generated from a combination of the originating drive serial number and the current date and time with a random number concatenated thereto. When a piece of media is loaded into a drive, the drive examines the reserved area for the presence of an identifier. If not present. the drive generates and records an identifier before performing whatever disk access operations have been requested. If the identifier is present, the drive is prevented from overwriting the identifier with a new one and the disk access operations are performed immediately. Once the media is provided with its identifier, the media, and any errors associated with the media, can be tracked throughout its life.
-
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.
-
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.
-
-
-
-
-
-
-
-
-
Search Results
61
records
(took 0.018 seconds)
