信息技术.120 mm(每面8,54 G字节)与80 mm(每面2,66 G字节)DVD双层可记录光盘(DL的DVD-R

[中文适用范围]： 本国际标准规定了 120 毫米和 80 毫米双层 DVD 可刻录光盘的机械、物理和光学特性，以实现此类光盘的互换。 它规定了预记录、未记录和已记录信号的质量、数据格式、信息区格式、未记录区格式和记录方法，从而允许通过此类盘进行信息交换。 该盘被识别为双层 DVD 可刻录盘（DL 为 DVD-R）。 本国际标准规定了以下内容： ——标称直径为 120 毫米和 80 毫米的圆盘，可以是单面的，也可以是双面的； ——符合条件； ——磁盘运行和存储的环境； ——磁盘的机械和物理特性，以便提供数据处理系统之间的机械交换； ——未记录盘上预记录信息的格式，包括磁道和扇区的物理配置、纠错码和使用的编码方法； ——磁盘上数据和记录信息的格式，包括磁道和扇区的物理配置、纠错码和使用的编码方法； ——来自磁盘上预记录和未记录区域的信号特征，使数据处理系统能够读取预记录信息并将其写入磁盘； ——磁盘上记录的信号的特征，使数据处理系统能够从磁盘读取数据。 该国际标准规定了磁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 12862:2011 specifies the mechanical, physical and optical characteristics of a 120 mm and an 80 mm dual layer DVD recordable disk to enable the interchange of such disks. It specifies the quality of the pre-recorded, unrecorded and recorded signals, the format of the data, the format of the information zone, the format of the unrecorded zone, and the recording method, thereby allowing for information interchange by means of such disks. This disk is identified as a DVD recordable disk for dual layer (DVD-R for DL). ISO/IEC 12862:2011 specifies the following: 120 mm and 80 mm nominal diameter disks that can be either single- or double-sided; the conditions for conformance; the environments in which the disk is to be operated and stored; the mechanical and physical characteristics of the disk, so as to provide mechanical interchange between data processing systems; the format of the pre-recorded information on an unrecorded disk, including the physical disposition of the tracks and sectors, the error correcting codes and the coding method used; the format of the data and the recorded information on the disk, including the physical disposition of the tracks and sectors, the error correcting codes and the coding method used; the characteristics of the signals from pre-recorded and unrecorded areas on the disk, enabling data processing systems to read the pre-recorded information and to write to the disks; the characteristics of the signals recorded on the disk, enabling data processing systems to read the data from the disk. ISO/IEC 12862:2011 provides for interchange of disks between disk drives. Together with a standard for volume and file structure, it provides for full data interchange between data processing systems.