Optical disk and optical disk drive device

• US 5,825,728 A
• Filed: 08/20/1997
• Issued: 10/20/1998
• Est. Priority Date: 10/05/1992
• Status: Expired due to Term

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Kondo, Junichi, Nakane, Kazuhiko, Yoshimoto, Kyosuke, Furukawa, Teruo, Ohata, Hiroyuki, Ototake, Masafumi, Rao, M. C.
• Primary Examiner(s): Swann, Tod R.
• Assistant Examiner(s): CHU, KIM KWOK
• Application Number:
  US08/914,782
• Time in Patent Office: 426 Days
• Field of Search: 369/32, 369/54, 369/58, 369/275.1, 369/275.3, 369/275.4
• US Class Current: 369/30.11
• CPC Class Codes: G06F 2003/0697 device management, e.g. handlers, drivers, I/O schedulers
• CPC Class Codes: G06F 3/0601 Interfaces specially adapted for storage systems
• CPC Class Codes: G06F 3/0607 by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
• CPC Class Codes: G06F 3/0608 Saving storage space on storage systems
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0611 in relation to response time
• CPC Class Codes: G06F 3/0613 in relation to throughput
• CPC Class Codes: G06F 3/0619 in relation to data integrity, e.g. data losses, bit errors
• CPC Class Codes: G06F 3/0626 Reducing size or complexity of storage systems
• CPC Class Codes: G06F 3/0637 Permissions
• CPC Class Codes: G06F 3/0638 Organizing or formatting or addressing of data
• CPC Class Codes: G06F 3/064 Management of blocks
• CPC Class Codes: G06F 3/0643 Management of files
• CPC Class Codes: G06F 3/0644 Management of space entities, e.g. partitions, extents, pools
• CPC Class Codes: G06F 3/0674 Disk device
• CPC Class Codes: G06F 3/0677 Optical disk device, e.g. CD-ROM, DVD
• CPC Class Codes: G11B 11/10563 Access of indexed parts
• CPC Class Codes: G11B 11/10595 Control of operating function
• CPC Class Codes: G11B 20/1258 where blocks are arranged within multiple radial zones, e.g. Zone Bit Recording or Constant Density Recording discs, MCAV discs, MCLV discs
• CPC Class Codes: G11B 20/1883 Methods for assignment of alternate areas for defective areas
• CPC Class Codes: G11B 20/1889 : with discs
• CPC Class Codes: G11B 2020/1232 : sector, i.e. the minimal addressable physical data unit
• CPC Class Codes: G11B 2020/1242 : the area forming one or more zones, wherein each zone is shaped like an annulus or a circular sector
• CPC Class Codes: G11B 2020/1247 : rewritable zone, e.g. a RAM zone of a hybrid disc having ROM and RAM areas
• CPC Class Codes: G11B 2020/1248 : ROM zone, i.e. an unrewritable zone
• CPC Class Codes: G11B 2020/1259 : with ROM/RAM areas
• CPC Class Codes: G11B 2020/1267 : Address data
• CPC Class Codes: G11B 2020/1274 : stored in pre-pits, i.e. in embossed pits, ROM marks or prepits
• CPC Class Codes: G11B 2020/1285 : Status of the record carrier, e.g. space bit maps, flags indicating a formatting status or a write permission
• CPC Class Codes: G11B 2220/20 : Disc-shaped record carriers
• CPC Class Codes: G11B 2220/213 : Read-only discs
• CPC Class Codes: G11B 2220/216 : Rewritable discs
• CPC Class Codes: G11B 2220/218 : Write-once discs
• CPC Class Codes: G11B 2220/2537 : Optical discs
• CPC Class Codes: G11B 27/105 : of operating discs
• CPC Class Codes: G11B 27/3027 : used signal is digitally coded
• CPC Class Codes: G11B 27/329 : on a disc [VTOC]
• CPC Class Codes: G11B 7/00745 : Sectoring or header formats within a track formats in general G11B20/12
• CPC Class Codes: G11B 7/0079 : Zoned data area, e.g. having different data structures or formats for the user data within data layer, Zone Constant Linear Velocity [ZCLV], Zone Constant Angular Velocity [ZCAV], carriers with RAM and ROM areas
• CPC Class Codes: G11B 7/013 : for discrete information, i.e. where each information unit is stored in a distinct discrete location , e.g. digital information formats within a data block or sector
• CPC Class Codes: G11B 7/08505 : Methods for track change, selection or preliminary positioning by moving the head
• CPC Class Codes: G11B 7/126 : Circuits, methods or arrangements for laser control or stabilisation

Abstract

An optical disk physical has a recording region divided into zones, each zone including physical tracks adjacent to each other. An integer number of sectors are provided in each physical track. The angular recording density is higher in the more outward zones such that the linear recording density is substantially constant throughout the recording region, and logical tracks are formed of a predetermined number of sectors, independent of the physical tracks. The conversion between the logical track and sector addresses read from the disk and the linear logical addresses supplied from a host device is easy. The addresses written in headers of the sectors in the logical track in which data are actually recorded, including substitute sectors used in place of defect sectors, are preferably consecutive to further facilitate the conversion between the logical track and sector addresses read from the disk and the linear logical addresses supplied from the host device. Each of the zones can be set to serve as any of the different types of recording area, independently of other zones.

Claims

1. An optical disk drive device for use with an optical disk;

said optical disk including,

a recording region;

a plurality of physical tracks formed in said recording region, each physical track corresponding to a single revolution of said optical disk;

said recording region being divided into a plurality of annular zones centered at a center of said optical disk, an annular recording density of said optical disk being higher in zones further form said center of said optical disk such that a linear recording density of said optical disk is substantially constant throughout said recording region;

an integer number of sectors formed in each of said physical tracks, each sector including a header field with a track address field;

one or more of said sectors being formed into one of a plurality of logical tracks by setting a track address in said track address field of each sector to indicate membership in one of said logical tracks, said logical tracks being divided into revolution groups such that a number of said revolution groups equals a number of said zones, thus, each revolution group corresponds to one of said zones, and boundaries between neighboring revolution groups coinciding with boundaries of corresponding zones;

the number of logical tracks and adjacent annular zones differing by a constant number;

each logical track is composed of 2ⁿ sectors, with n being an integer;

said optical disk drive device determines which one of said zones contains a target sector based on a product of said constant number and the number of said zones.

2. The optical disk drive device according top claim 1, wherein said optical disk drive device includes said optical disk.

3. A method for accessing an optical disk;

said optical disk including,

a recording region;

a plurality of physical tracks formed in said recording region, each physical track corresponding to a single revolution of said optical disk;

said recording region being divided into a plurality of annular zones centered at a center of said optical disk, an annular recording density of said optical disk being higher in zones further from said center of said optical disk such that a linear recording density of said optical disk is substantially constant throughout said recording region;

an integer number of sectors formed in each of said physical tracks, each sector including a header field with a track address field;

one or more of said sectors being formed into one of a plurality of logical tracks by setting a track address in said track address field of each sector to indicate membership in one of said logical tracks, said logical tracks being divided into revolution groups such that a number of said revolution groups equals a number of said zones, thus, each revolution group corresponds to one of said zones, and boundaries between neighboring revolution groups coinciding with boundaries of corresponding zones;

the number of logical tracks and adjacent annular zones differing by a constant number;

each logical track is composed of 2ⁿ sectors, with n being an integer;

said method comprising;

(a) multiplying said constant number and said number of zones to produce a product; and

(b) determining which one of said zones contains a target sector based on said product.