Back to the list


Data interchange on 90 mm optical disk cartridges - Capacity: 385 Megabytes per cartridge

1st edition, June 1995

This Ecma Standard specifies the characteristics of 90 mm Optical Disk Cartridges, (ODCs) with a capacity of 385 Mbytes per cartridge. The Standard specifies one type of such cartridge, viz.

Type R/W
Provides for data to be written, read and erased many times over the whole of the recording surface of the disk using the thermo-magnetic and magneto-optical effects.

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 media interchange between optical disk drives. Together with a Standard for volume and file structure, it provides for full data interchange between data processing systems.

Download this standard


CategoryData interchange – optical disks and cartridges

SubcategoryOptical disks and cartridges

Technical CommitteeTC31