标准摘要
[中文适用范围]： 该国际标准规定了容量为 8.55 GB 和 17.1 GB 的 120 毫米可重写光盘的机械、物理和光学特性。 它规定了已记录和未记录信号的质量、数据格式和记录方法，从而允许通过此类磁盘进行信息交换。 使用相变方法可以多次写入、读取和覆盖数据。 这些磁盘被标识为+RW DL。 该国际标准还指定了容量为 2.66 GB 和 5.32 GB 的 80 毫米磁盘。 除了一些与较小尺寸相关的参数外，这些磁盘具有与 120 毫米磁盘相同的特性。 80 毫米磁盘的所有特有参数均在附录 A 中规定。 本国际标准规定 - 该磁盘的两种相关但不同的类型（参见第 7 条）; ——一致性条件; ——测试磁盘的环境、操作和存储; ——磁盘的机械、物理和尺寸特性，以便在数据处理系统之间提供机械交换; ——磁盘上信息的格式，包括磁道和扇区的物理配置、错误纠正码和编码方法; ——记录在磁盘上的信号的特征，从而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磁盘交换。 它与卷和文件结构标准一起提供了数据处理系统之间的完整数据交换。 [外文原描述]： ISO/IEC 29642:2007 specifies the mechanical, physical and optical characteristics of 120 mm rewritable optical disks with capacities of 8,55 Gbytes and 17,1 Gbytes. It specifies the quality of the recorded and unrecorded signals, the format of the data and the recording method, thereby allowing for information interchange by means of such disks. The data can be written, read and overwritten many times using the phase change method. These disks are identified as +RW DL. ISO/IEC 29642:2007 also specifies 80 mm disks with capacities of 2,66 Gbytes and 5,32 Gbytes. These disks have the same characteristics as the 120 mm disks, except for some parameters related to the smaller dimensions. All parameters unique for the 80 mm disks are specified. ISO/IEC 29642:2007 specifies two related but different Types of this disk; the conditions for conformance; the environments in which the disk is to be tested, operated and stored; the mechanical, physical and dimensional characteristics of the disk, so as to provide mechanical interchange between data processing systems; the format of the information on the disk, including the physical disposition of the tracks and sectors, the error correcting codes and the coding method; the characteristics of the signals recorded on the disk, thus enabling data processing systems to read the data from the disk. ISO/IEC 29642:2007 provides for the interchange of disks between optical disk drives. Together with a standard for volume and file structure, it provides for full data interchange between data processing systems.
英文名称Information technology - Data interchange on 120 mm and 80 mm optical disk using +RW DL format - Capacity: 8,55 Gbytes and 2,66 Gbytes per side (recording speed 2,4x)