标准摘要
[中文适用范围]： 本国际标准规定了容量为 8,55 Gbytes 和 17,1 Gbytes 的 120 mm 可重写光盘的机械、物理和光学特性。它规定了记录信号和未记录信号的质量、数据格式和记录方法，从而允许通过这些光盘进行信息交换。数据可以使用相变方法多次写入、读取和覆盖。这些光盘被标识为 +RW DL。本国际标准还规定了容量为 2,66 Gbytes 和 5,32 Gbytes 的 80 mm 光盘。这些光盘具有与 120 mm 光盘相同的特性，除了与较小尺寸相关的一些参数。所有 80 mm 光盘独有的参数均在附录 A 中规定。本国际标准规定了以下内容：两种相关但不同的光盘类型（见第 7 章）；符合性的条件；测试、操作和存储光盘的环境；光盘的机械、物理和尺寸特性，以便在数据处理系统之间实现机械互换；光盘上信息的格式，包括轨道和扇区的物理布局、纠错码和编码方法；记录在光盘上的信号特性，从而使数据处理系统能够从光盘读取数据。本国际标准提供了光盘在光盘驱动器之间的互换。结合卷和文件结构的标准，它提供了数据处理系统之间的完整数据互换。 [外文原描述]： ISO/IEC 29642:2009 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 29642:2009 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 in an annex. ISO/IEC 29642:2009 specifies the following: 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 29642:2009 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)