ISO/IEC 15041:1997
Information technology - Data interchange on 90 mm optical disk cartridges - Capacity: 640 Mbytes per cartridge

Standard No.

ISO/IEC 15041:1997

Release Date

1997

Published By

International Organization for Standardization (ISO)

Latest

ISO/IEC 15041:1997

Scope

This International Standard defines the characteristics of 90 mm Optical Disk Cartridges (ODC) with a capacity of 640 Mbytes per Cartridge. The Standard specifies five related, but different implementations of such cartridges, viz. Type R/W 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 effects. Type DOW Provides for data to be written and read many times over the whole recording surface of the disk, using the direct overwrite thermo-magnetic and magneto-optical effects requiring a single external magnetic field. Type P-ROM 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. Type P-DOW 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 DOW. Type O-ROM 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 and Type DOW are also referred to as "fully rewritable", Type P-ROM and Type P-DOW as "partially embossed" and Type O-ROM as "fully embossed". For each Type, this International Standard provides for 512-byte and 2 048-byte sectors. All sectors on a disk are of the same size. This International 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 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 processing systems.

ISO/IEC 15041:1997 history

• 1997 ISO/IEC 15041:1997 Information technology - Data interchange on 90 mm optical disk cartridges - Capacity: 640 Mbytes per cartridge