ISO-13549-1993.pdf
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1、INTERNATIONAL STANDARD ISOJIEC 13549 First edition 1993-I 2-l 5 Information technology - Data interchange on 130 mm optical disk cartridges - Capacity: I,3 gigabytes per cartridge Technologies de Iinforma tion - khange de donnkes sur cartouches de disque optique de diam - the environments in which t
2、he cartridges are to be operated and stored; - the mechanical, physical and dimensional characteristics of the case and of the cartridges, so as to provide mechanical interchangeability between the data processing systems; - the format of the information on the disk, both embossed and user-written,
3、including the physical disposition of the tracks and sectors, the error correction codes, and the modulation method used; - the characteristics of the embossed information on the disk; - the magneto-optical characteristics of the disk, enabling processing systems to write data onto the disk; - the m
4、inimum quality of user-written data on the disk, enabling data processing systems to read data from the disk. This International Standard provides for interchange between optical disk drives. Together with a standard for volume and file structure, it provides for full data interchange between data p
5、rocessing systems. 2 Conformance 2.1 Optical disk cartridge (ODC) An optical disk cartridge claiming conformance with this International Standard shall specify its Type. It shall be in conformance if it meets all mandatory requirements specified herein for that Type. 2.2 Generating system A claim of
6、 conformance with this International Standard shall specify which Type(s) is (are) supported. A system generating an ODC for interchange shall be entitled to claim conformance with this International Standard if it meets the mandatory requirements of this Standard for the Type(s) specified. 2.3 Rece
7、iving system A claim of conformance with this International Standard shall specify which Type(s) is (are) supported. A system receiving an ODC for interchange shall be entitled to claim conformance with this International Standard if it is able to handle any ODC which conforms to this International
8、Standard for the Type(s) specified. 3 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and pa
9、rties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standard listed below. 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/111111100
10、1, User=Wing, Bernie Not for Resale, 04/03/2007 23:29:22 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 13549:1993 (E) EC 950: 1991, Safety of information technology equipment, including electrical business equipment 4 Definitions For the purposes of this Internati
11、onal Standard, the following definitions apply. 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.11 4.12 4.13 4.14 4.15 4.16 4.17 band : A part of the Data Zone comprising a futed number of consecutive physical tracks with data embossed or recorded at a constant frequency. case : The housing for an optica
12、l disk, that protects the disk and facilitates disk interchange. Channel bit : The smallest element of data on a disk. It is recorded as either a space or a mark. Two channel bits are used to represent one user bit. Clamping Zone : The annular part of the disk within which the clamping force is appl
13、ied by the clamping device. control track : A track containing the information on media parameters and format necessary for writing, reading and erasing the remaining tracks on the optical disk. Cyclic Redundancy Check (CRC) : A method for detecting errors in data. defect management : A method for h
14、andling the defective areas on the disk. disk reference plane : A plane defined by the perfectly flat annular surface of an ideal spindle onto which the Clamping Zone of the disk is clamped, and which is normal to the axis of rotation. entrance surface : The surface of the disk on to which the optic
15、al beam first impinges. Error Correction Code (ECC) : An error-detecting code designed to correct certain kinds of errors in data. format : The arrangement or layout of the data on the disk. fully embossed disk : An optical disk caiiridge in which all data fields in the Data Zone are embossed. fully
16、 rewritable disk : An optical disk cartridge in which the data in specified areas can be rewritten by an optical bfxm. hub : The central feature on the disk which interacts with the spindle of the disk drive to provide radial centring and the clamping force. interleaving : The process of allocating
17、the physical sequence of units of data so as to render the data more immune to burst errors. Kerr rotation : The rotation of the plane of polarization of an optical beam upon reflection from the recording layer as caused by the magneto-optical Kerr effect. land and groove : A trench-like feature of
18、the disk, applied before the recording of any information, and used to defme the track location. The groove is located nearer to the entrance surface than the land with which it is paired to form a track. Copyright International Organization for Standardization Provided by IHS under license with ISO
19、 Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/03/2007 23:29:22 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 13549:1993 (E) 4.18 4.19 4.20 4.21 4.22 optical disk : A disk that will accept and retain information in the form of marks in a
20、recording layer or have these marks pre-recorded, that can be read with an optical beam. 4.23 optical disk cartridge (ODC) : A device consisting of a case containing an optical disk. 4.24 partially embossed disk : An optical disk cartridge which contains both rewritable and embossed data fields in t
21、he Data Zone. 4.25 physical track : The path which is followed by the focus of the optical beam during one revolution of the disk. 4.26 physical track group : A fixed number of consecutive physical tracks in the Data Zone. 4.27 pitch : The distance between adjacent physical track centrelines, measur
22、ed in a radial direction. 4.28 polarization : The direction of polarization of an optical beam is the direction of the electric vector of the beam. NOTE 1 - The plane of polarization is the plane containing the electric vector and the direction of propagation of the beam. The polarization is right-
23、handed when to an observer looking in the direction of propagation of the beam, the end-point of the electric vector would appear to describe an ellipse in the clockwise sense. 4.29 pre-recorded mark : A mark so formed as to be unalterable by magneto-optical means. 4.30 read power : The optical powe
24、r, incident at the entrance surface of the disk, used when reading. NOTE 2 - It is specified as a maximum power that may be used without damage to the written data. Lower power may be used provided that the signal-to-noise ratio and other requirements of this International Standard are met. 4.31 rec
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