信息技术 信息交换用130mm盒式光盘 容量:每盒5.2GB

[中文适用范围]： 本国际标准通过使用多种型号名称规定了一系列相关 130 毫米光盘盒 (ODC) 的特性。 磁盘有两个面，称为 A 面和 B 面。 每面的标称容量为 2.6 GB。 R/W型利用热磁效应和磁光效应，在相应盘面的记录表面上多次写入、读取和擦除数据。 P-ROM 型允许通过冲压或其他方式预先记录和复制磁盘表面的一部分。 磁盘的这一部分的读取无需借助磁光效应。 所有未预先记录的部分都提供满足R/W类型要求的数据。 O-ROM 型允许通过冲压或其他方式预先记录和复制整个磁盘表面。 无需借助磁光效应即可读取相应的磁盘面。 DOW 型使用需要单个外部磁场的直接重写热磁和磁光效应，可以在相应磁盘面的记录表面上多次写入和读取数据。 P-DOW 型允许通过冲压或其他方式预先记录和复制磁盘表面的一部分。 磁盘的这一部分的读取无需借助磁光效应。 所有未预先记录的部分都提供满足 DOW 类型要求的数据。 WO 型利用热磁和磁光效应提供一次写入、多次读取的功能。 WO-DOW 型利用直接覆盖热磁和磁光效应提供一次写入、多次读取的功能。 此外，对于每种类型，本国际标准规定了包含扇区大小为 512 字节的磁盘的盒式磁带、包含扇区大小为 1 024 字节的磁盘的盒式磁带以及包含扇区大小为 2 048 字节的磁盘的盒式磁带。 磁盘的所有扇区大小相同。 本国际标准规定 - 一致性测试和参考驱动器的条件； ——墨盒的运行和储存环境； ——盒的机械、物理和尺寸特性，以便提供数据处理系统之间的机械互换性； ——磁盘上信息的格式，包括压印的和用户写入的，包括磁道和扇区的物理配置、纠错码、使用的调制方法； ——盘上压印信息的特征； ——磁盘的磁光特性，使处理系统能够将数据写入磁盘； ——用户在磁盘上写入数据的最低质量，使数据处理系统能够从磁盘读取数据。 该国际标准规定了光盘驱动器之间的互换。 它与卷和文件结构标准一起提供数据处理系统之间的完整数据交换。 [外文原描述]： This International Standard specifies the characteristics of a series of related 130 mm optical disk cartridges (ODCs) by using a number of Type designations. A disk has two sides, called Side A and Side B. Each side can have a nominal capacity of 2,6 Gbytes. Type R/W provides for data to be written, read and erased many times over the recording surface of the corresponding disk side, using the thermo-magnetic and magneto-optical effects. Type P-ROM provides for a part of the disk surface to be pre-recorded and reproduced by stamping or other means. This part of the disk is read without recourse to the magneto-optical effect. All parts which are not pre-recorded provide for data to meet the requirements of Type R/W. Type O-ROM provides for the whole of the disk surface to be pre-recorded and reproduced by stamping or other means. The corresponding disk sides are read without recourse to the magneto-optical effect. Type DOW provides for data to be written and read many times over the recording surface of the corresponding disk side, using the direct overwrite thermomagnetic and magneto-optical effects requiring a single external magnetic field. Type P-DOW provides for a part of the disk surface to be pre-recorded and reproduced by stamping or other means. This part of the disk is read without recourse to the magneto-optical effect. All parts which are not pre-recorded provide for data to meet the requirements of Type DOW. Type WO provides write once, read multiple functionality using the thermo-magnetic and magneto-optical effects. Type WO-DOW provides write once, read multiple functionality using the direct overwrite thermo-magnetic and magneto-optical effects. In addition, for each Type, this International Standard provides for cartridges containing a disk with a sector size of 512 bytes, cartridges containing a disk with a sector size of 1 024 bytes and cartridges containing a disk with a sector size of 2 048 bytes. All sectors of a disk are 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, physical and dimensional 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, the modulation methods 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.