Data Interchange on 90 mm Optical Disk
Cartridges - Capacity: 230 Megabytes per Cartridge
2nd edition (December 1994)
This Ecma Standard specifies the characteristics of 90 mm Optical Disk
Cartridges (ODC) with a capacity of 230 Mbytes per Cartridge. The Standard
specifies three related, but different implementations of such cartridges,
Provides for data to be written, read and erased many times over the
whole recording surface of the disk using the thermo-magnetic and magneto-optical
Provides for a part of the disk surface to be embossed by stamping
or other means. This part of the disk is read without recourse to the magneto-optical effect. All parts which are not embossed provide for data to meet the requirements
of Type R/W.
Provides for the whole of the disk surface to be embossed and reproduced by stamping or other means. This type of disk is read without recourse to the magneto-optical effect.
Type R/W, Type P-ROM and Type O-ROM are also referred to as "fully rewritable", "partially embossed" and "fully embossed", respectively.
This Ecma Standard specifies
the conditions for conformance testing and the Reference Drive;
the environments in which the cartridges are to be operated and stored;
the mechanical and physical characteristics of the cartridge, so as to provide mechanical interchangeability between data processing systems;
the format of the information on the disk, both embossed and user-written; 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 minimum quality of user-written data on the disk, enabling data processing systems to read data from the disk.
This Ecma 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 processing systems.
The following files can be freely downloaded:
||8 633 001
||Acrobat (r) PDF file
This Ecma publication is also approved as ISO/IEC 13963.
The previous replaced "historical" edition of this Ecma Standard is available here.