EP0207762A2
Expired / Lapsed
EP
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Method of formatting storage medium and drive unit therefor
Assignee: Panasonic Holdings Corp
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Filing: 1986-06-27
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Granted: —
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Expires: 2006-06-27
Abstract
Abstract A method for formatting a storage medium into sectors each containing an ID field for storing ID information. The ID information includes addresses of a plurality of sectors, preferably the address of the sector containing the ID field and the address of at least one subsequent sector. Also diedosed is a drive unit for use with the storage medium, formatted as described above. The drive unit reads the ID information from the ID field, then temporarily stores either the ID information of a sector other than the sector containing the ID field or the result of an evaluation of the ID information, and refers to the stored ID information when the address of the sector corresponding to the stored information is later examined.
Inventors
- 👤 Shinichi Tanaka
- 👤 Shigeru Matsukawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 21:09
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/12; G11B20/1217; G11B20/1252; G11B27/00; G11B27/10; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B2220/00; G11B2220/20; G11B2220/25; G11B2220/2537
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
55 words
A method of formatting a storage medium comprising the steps of dividing said storage medium into a plurality of sectors each containing an ID field, and recording in said ID field an ID information including address informations of a plurality of sectors each bearing a predetermined positional relationship to a sector containing said ID field.
Claim 2
Independent Claim
55 words
A method of formatting a storage medium comprising the steps of dividing said storage medium into a plurality of sectors each containing an ID field, and recording in said ID field an ID information including address informations of a plurality of sectors each bearing a predetermined positional relationship to a sector containing said ID field.
Claim 3
Dependent Claim
38 words
The method as set forth in claim 1, wherein said ID information recorded in said ID field includes an address information of said sector containing said ID field and an address information of at least one subsequent sector.
Claim 4
Dependent Claim
41 words
The method as set forth in claim 2, wherein said ID field comprises at least one ID block which records the address information of said sector containing said ID field and a sector number of said at least one subsequent sector.
Claim 5
Dependent Claim
56 words
The method as set forth in claim 3, wherein said plurality of sectors are arranged spirally to form a spiral information track which is divided into a plurality of logical tracks, and wherein last sector of each of said logical tracks has an ID field in which an information for identifying said last sector is recorded.
Claim 6
Dependent Claim
62 words
The method as set forth in claim 2, wherein said plurality of sectors are arranged spirally to form a spiral information track which is divided into a plurality of logical tracks, and wherein each of said logical tracks is shorter by at least one sector than a circumference on which said each of said logical tracks is located on said storage medium.
Claim 7
Dependent Claim
110 words
A drive unit for writing data Into and reading data from a storage medium having a plurality of sectors each containing an ID field in which an ID information including address informations of a plurality of sectors each bearing a predetermined relationship to the sector containing said ID field, said drive unit comprising: an address storage means for storing in a specified location at least a part of said ID information read from said ID field; and a control means which refer to the information stored in said address storage means to recognize an address of a desired sector, and writes data into or reads data from said desired sector.
Claim 8
Dependent Claim
110 words
A drive unit for writing data Into and reading data from a storage medium having a plurality of sectors each containing an ID field in which an ID information including address informations of a plurality of sectors each bearing a predetermined relationship to the sector containing said ID field, said drive unit comprising: an address storage means for storing in a specified location at least a part of said ID information read from said ID field; and a control means which refer to the information stored in said address storage means to recognize an address of a desired sector, and writes data into or reads data from said desired sector.
Claim 9
Dependent Claim
59 words
The drive unit as set forth in claim 6, wherein said address storage means stores in said specified location a predetermined information which is different from any one of the address informations of the sectors on the storage medium when an address information which should be stored in said specified location is not correctly read from said ID field.
Claim 10
Dependent Claim
92 words
The drive unit as set forth in claim 6, wherein said control means writes data into said desired sector only when an address of a sector read from an ID field of said sector is recognized as the address of said desired sector, and reads data from said desired sector only when an information read from an ID field of a sector is compared with the information stored in said address storage means and the address of the sector containing the ID field is recognized as the address of said desired sector.
Claim 11
Dependent Claim
107 words
The drive unit as set forth in claim 8, wherein said ID field comprises a plurality of ID blocks each storing an address information of a sector containing said ID field and an address information of next sector, and wherein said control means writes data into said desired sector only when the address of said desired sector is recognized from informations read from a plurality of ID blocks including an ID block in a ID field contained in said desired sector, and reads data from said desired sector only when the address of said desired sector is recognized from informations read from any plurality of ID blocks.
Claim 12
Dependent Claim
60 words
The drive unit as set forth in claim 6, wherein said address storage means stores an address information of a sector next to a sector containing an ID field from which an ID information including an address information of the sector containing the ID field and the address information of the sector next to the sector containing the ID field.
Claim 13
Dependent Claim
57 words
The drive unit as set forth in claim 10, wherein said control means reads from the ID field a track number and a sector number of a current sector containing the ID field and a sector number of next sector, and infers a track number of the next sector from the track number of the current sector.
References Cited (Backward Citations)
No citation records indexed.
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