公开(公告)号：HK72196A

公开(公告)日：1996-05-03

申请号：HK72196

申请日：1996-04-25

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).

公开(公告)号：DE68915800T2

公开(公告)日：1994-12-01

申请号：DE68915800

申请日：1989-01-10

Applicant: IBM

Inventor： KULAKOWSKI JOHN EDWARD ,  MEANS RODNEY JEROME

IPC: G06F3/06 ,  G06F12/00 ,  G11B20/12 ,  G11B20/18

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：DE3887726T2

公开(公告)日：1994-08-11

申请号：DE3887726

申请日：1988-09-01

Applicant: IBM

Inventor： KULAKOWSKI JOHN EDWARD ,  MEANS RODNEY JEROME

IPC: G11B27/10 ,  G11B27/13 ,  G11B27/28 ,  G11B27/11

公开(公告)号：DE68914550D1

公开(公告)日：1994-05-19

申请号：DE68914550

申请日：1989-08-31

Applicant: IBM

Inventor： KULAKOWSKI JOHN EDWARD ,  MEANS RODNEY JEROME ,  OLDHAM DAVID MITCHELL ,  TAYEFEH MOROVAT

IPC: G11B11/10 ,  G11B7/00 ,  G11B7/004 ,  G11B7/005 ,  G11B7/0055 ,  G11B7/13 ,  G11B11/105 ,  G11B19/04 ,  G11B20/18 ,  G11B27/36

公开(公告)号：DE3887726D1

公开(公告)日：1994-03-24

申请号：DE3887726

申请日：1988-09-01

Applicant: IBM

Inventor： KULAKOWSKI JOHN EDWARD ,  MEANS RODNEY JEROME

IPC: G11B27/10 ,  G11B27/13 ,  G11B27/28 ,  G11B27/11

公开(公告)号：DE3586337T2

公开(公告)日：1993-03-04

申请号：DE3586337

申请日：1985-03-22

Applicant: IBM

Inventor： KULAKOWSKI JOHN EDWARD

IPC: G06F12/00 ,  G06F3/08 ,  G06F17/30 ,  G06F15/40

公开(公告)号：DE3586337D1

公开(公告)日：1992-08-20

申请号：DE3586337

申请日：1985-03-22

Applicant: IBM

Inventor： KULAKOWSKI JOHN EDWARD

IPC: G06F12/00 ,  G06F3/08 ,  G06F17/30 ,  G06F15/40

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

Inventor： JAQUETTE GLEN ALAN ,  KULAKOWSKI JOHN EDWARD ,  MCDOWELL JUDSON ALLEN ,  MEANS RODNEY JEROME

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.

公开(公告)号：DE69120757T2

公开(公告)日：1997-01-23

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.

公开(公告)号：DE69114437T2

公开(公告)日：1996-06-20

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).