# US 5,708,650 A · Multiple format interchangeable optical recording medium and method of controlling same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,708,650 A - Document ID: US5708650A - Status: Granted - Kind: A - Application number: 08/659,070 - Filed: 1996-06-04 - Granted: 1998-01-13 - Earliest claimed: 1993-08-26 - Assignees: Fujitsu Limited - Inventors: Kazuo Nakashima; Kenichi Utsumi - Web page: https://patentgrep.com/patent/US5708650A ## CPC - G11B 27/329: {on a disc [VTOC]} - G06F 3/0601: {Interfaces specially adapted for storage systems} - G06F 3/0604: {Improving or facilitating administration, e.g. storage management} - G06F 3/0626: {Reducing size or complexity of storage systems} - G06F 3/0638: {Organizing or formatting or addressing of data} - G06F 3/0644: {Management of space entities, e.g. partitions, extents, pools} - G06F 3/0677: {Optical disk device, e.g. CD-ROM, DVD} - G11B 19/02: Control of operating function, e.g. switching from recording to reproducing - G11B 19/12: by sensing distinguishing features of {or on} records, e.g. diameter {end mark} - G11B 20/1217: {on discs} - G11B 2020/1259: {with ROM/RAM areas} - G11B 2220/211: Discs having both read-only and rewritable or recordable areas containing application data; Partial ROM media - G11B 2220/2525: Magneto-optical [MO] discs - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract Common-use data (FATs, a directory, files, etc.) is recorded in a first area of an interchangeable recording medium, and logical format information of a plurality of types for managing the common-use data recorded in the first area is recorded in the second area. When the interchangeable recording medium is loaded, a computer reads logical format information conforming to its own machine type from the second area and subsequently accesses the common-use data in the first area based upon the logical format information read. Further, a corresponding relationship between computers and storage locations of the logical format information is recorded in a third area of the interchangeable recording medium. Each computer recognizes the location, at which its own logical format information has been stored, by referring to the corresponding relationship and reads the logical format information from this location. The computer subsequently accesses the common-use data in the first area based upon the logical format information read. ## Claims ### Claim 1 A multiple format interchangeable optical recording medium comprising: a first area for storing file management data accessible by a plurality of types of computers; and a second area for storing a plurality of types of computer logical format information corresponding to said plurality of types of computers, for managing the file management data recorded in said first area. ### Claim 2 (depends on 1) The multiple format interchangeable optical recording medium according to claim 1, wherein said computer logical format information includes address information necessary to access the file management data stored in said first area. ### Claim 3 A method of accessing data of a multiple format interchangeable optical recording medium storing file management data accessible by a plurality of types of computers, and computer logical format information corresponding to said plurality of types of computers for managing the file management data, wherein a corresponding relationship between each of said of plurality of types of computers and storage locations of the computer logical format information is stored upon the recording medium, said method comprising: recognizing a location at which computer format information corresponding to the computer into which the recording medium has been loaded has been stored, by referring to said corresponding relationship; reading the logical format information from said location; and accessing data in the recording medium based upon the computer logical format information that has been read during said step of reading. ### Claim 4 A multiple format interchangeable optical recording medium comprising: a first area for storing file management data accessible by a plurality of types of computers; a second area for storing a plurality of types of computer logical format information for managing selected file management data recorded in said first area; a third area for storing storage locations of said computer logical format information for each of said plurality of types of computers. ### Claim 5 (depends on 4) The multiple format interchangeable optical recording medium according to claim 4, further comprising a fourth area for storing a machine-type recognition information for identifying machine type of a computer. ### Claim 6 A method of accessing data of a multiple format interchangeable optical recording medium storing file management data accessible by a plurality of types of computers, and computer logical format information corresponding to said plurality of types of computers for managing the file management data, said computer logical format information being recorded at a location that conforms to each of said plurality of types of computers, and includes address information to access selected file management data, said method comprising: reading computer logical format information corresponding to a computer type into which the recording medium has been loaded; and accessing data in the recording medium based upon the computer logical format information that has been read during said step of reading. ### Claim 7 (depends on 6) A method according to claim 6, wherein computer logical format information corresponding to each of said plurality of computers is recorded at a location that conforms to each of said plurality of types of computers, and the computer in which the interchangeable recording medium has been loaded reads logical format information from a location conforming to the computer into which the recording medium has been loaded. ### Claim 8 A method of accessing data of a multiple format interchangeable recording medium storing file management information data accessible by a plurality of types of computers, and computer logical format information corresponding to said plurality of types of computers for managing the file management data, wherein a corresponding relationship between each of said of plurality of types of computers and storage locations of the computer logical format information is stored upon the recording medium, said method comprising: recognizing a location at which computer format information corresponding to the computer into which the recording medium has been loaded has been stored, by referring to said corresponding relationship; reading the logical format information from said location; accessing data in the recording medium based upon the computer logical format information that has been read during said step of reading. ### Claim 9 A method of accessing data of a multiple format interchangeable recording medium storing file management data accessible by a plurality of types of computers, and computer logical format information corresponding to said plurality of types of computers for managing the file management data, wherein computer logical format information corresponding to each of the plurality of types of computers is recorded at a location that conforms to each of the plurality of types of computers, and includes address information to access selected file management data, said method comprising: reading computer logical format information corresponding to a computer type into which the recording medium has been loaded; and accessing data in the recording medium based upon the computer logical format information that has been read during said step of reading. ### Claim 10 (depends on 9) A method according to claim 9, wherein computer logical format information corresponding to each of said plurality of types of computers is recorded at a location that conforms to each of said plurality of types of computers, and the computer in which the interchangeable recording medium has been loaded reads logical format information from a location conforming to the computer into which the recording medium has been loaded. ### Claim 11 (depends on 9) A method according to claim 9, wherein a corresponding relationship between each of said plurality of types of computers and storage locations of the computer logical format information and machine-type recognition information for identifying machine type of a computer into which the recording medium is loaded are respectively stored in the interchangeable recording medium, said reading step further comprising the substeps of: identifying a machine type of the computer into which the recording medium has been loaded by reading said machine-type recognition information; obtaining, from said corresponding relationship, a location at which the computer logical format information corresponding to the identified machine type has been recorded; and reading the computer logical format information from said location. ### Claim 12 A multiple format interchangeable recording medium comprising: a first area for storing file management data accessible by a plurality of types of computers; and a second area for storing a plurality of types of computer logical format information corresponding to said plurality of types of computers, for managing the file management data recorded in said first area. ### Claim 13 (depends on 12) The multiple format interchangeable recording medium according to claim 12, wherein said computer logical format information includes address information necessary to access the data stored in said first area. ### Claim 14 A multiple format interchangeable recording medium comprising: a first area for storing file management data accessible by a plurality of types of computers; a second area for storing a plurality of types of computer logical format information for managing selected file management data recorded in said first area; a third area for storing storage locations of said computer logical format information for each of said plurality of types of computers. ### Claim 15 (depends on 14) The multiple format interchangeable recording medium according to claim 14, further comprising a fourth area for storing a machine-type recognition information for identifying machine type of a computer. ### Claim 16 A method of accessing data of a multiple format interchangeable optical recording medium storing file management data accessible by a plurality of types of computers, computer logical format information corresponding to said plurality of types of computers for managing the file management data, and machine-type recognition information for identifying a machine type of a computer into which the recording medium is loaded are respectively stored in the interchangeable recording medium, said method comprising: identifying a machine type of the computer into which the recording medium has been loaded by reading said machine-type recognition information; obtaining, from said corresponding relationship, a location at which the computer logical format information corresponding to the identified machine type has been recorded; reading computer logical format information corresponding to a computer type into which the recording medium has been loaded from said location; and accessing data in the recording medium based upon the computer logical format information that has been read during said step of reading.