信息技术 120mm DVD-RAM光盘的情况

[中文适用范围]： 本国际标准规定了 ISO/IEC 16824 中规定的与 120 毫米 DVD-RAM 盘一起使用的外壳的特性。 本国际标准规定了此类外壳的三种相关但不同的实现方式，即：类型 1 为单面（类型 1S）或双面（类型 2S）DVD-RAM 光盘提供一个盒，使得光盘无法从盒中取出。 这种情况是可逆的。 类型 2 为单面 DVD-RAM 光盘（IS 型）提供一个盒，以便可以从盒中取出光盘。 这种情况是不可逆的。 类型 3 提供一个可以插入单面 DVD-RAM 光盘（IS 型）的盒子，然后将其用作盒式磁带。 这种情况是不可逆的。 本国际标准规定 - 箱子的操作和储存环境； ——外壳的尺寸和机械特性，以便提供数据处理系统之间的机械互换性；该国际标准规定了光盘驱动器之间的机械互换。 它与符合 ISO/IEC 16824 以及卷和文件结构标准的 120 毫米 DVD-RAM 磁盘一起，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 case for use with 120 mm DVD-RAM disks as specified in ISO/IEC 16824. This International Standard specifies three related, but different implementations of such cases, viz. Type 1 Provides a case for a one-sided (Type 1S) or a two-sided (Type 2S) DVD-RAM disk such that the disk can not be removed from the case. This case is reversible. Type 2 Provides a case for a one-sided DVD-RAM disk (Type 1S) such that the disk may be removed from the case. This case is not reversible. Type 3 Provides a case into which a one-sided DVD-RAM disk (Type 1S) may be inserted, then used as a cartridge. This case is not reversible. This International Standard specifies - the environments in which the cases are to be operated and stored; - the dimensional and mechanical characteristics of the case, so as to provide mechanical interchangeability between data processing systems; This International Standard provides for mechanical interchange between optical disk drives. Together with 120 mm DVD-RAM disks according to ISO/IEC 16824 and a standard for volume and file structure, it provides for full data interchange between data processing systems.