【国外标准】 Information technology - Data interchange on 300 mm optical disk cartridges of type WORM (Write Once Read Many) using irreversible effects - Capacity: 30Gbytes per cartridge

This International Standard specifies the characteristics of a 300 mm optical disk cartridge (ODC) of Type WORM (Write Once Read Many) using irreversible effects, with a capacity of 30 Gbytes. This WORM ODC's uses writing effects that are inherently irreversible. Written marks cannot be erased and attempted modifications of the written marks are detectable. This International Standard specifies 晅he conditions for conformance testing and the Reference Drive; 晅he environments in which the cartridges are to be operated and stored; 晅he mechanical, physical and dimensional characteristics of the cartridge, so as to provide mechanical interchange ability between data processing systems; 晅he format of the information on the disk, both pre-written and user-written, including the physical disposition of the tracks and sectors, the error correction codes, the modulation methods used; 晅he characteristics of the prerecorded information on the disk; 晅he recording characteristics of the disk, enabling processing systems to write data onto the disk; 晅he 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.