信息技术 信息交换用12.65mm宽卡式磁带盒 螺旋扫描记录 DTF-2

[中文适用范围]： 本国际标准规定了盒式磁带的物理和磁性特性，使用 12.65 毫米宽的磁带，以便在驱动器之间提供此类盒式磁带的物理交换。 它还指定了记录信号的质量、记录方法和记录格式，称为数字磁带格式-2 (DTF-2)，从而允许通过此类磁带在驱动器之间进行数据交换。 该格式支持可变长度逻辑记录、高速搜索以及使用注册算法进行数据压缩。 该国际标准规定了两种尺寸的包埋盒。 就本国际标准而言，较大的磁带被称为 L 型，较小的磁带被称为 S 型。 与卷和文件结构标准（例如国际标准 ISO 1001）一起，该国际标准提供了数据之间的完整数据交换。 处理系统。 [外文原描述]： This International Standard specifies the physical and magnetic characteristics of magnetic tape cassettes, using magnetic tape 12,65 mm wide so as to provide physical interchange of such cassettes between drives. It also specifies the quality of the recorded signals, the recording method and the recorded format, called Digital Tape Format-2 (DTF-2), thereby allowing data interchange between drives by means of such cassettes. The format supports variable length Logical Records, high-speed search, and the use of a registered algorithm for data compression. This International Standard specifies two sizes of cassette. For the purposes of this International Standard the larger cassette is referred to as Type L, and the smaller as Type S. Together with a standard for volume and file structure, e.g. International Standard ISO 1001, this International Standard provides for full data interchange between data processing systems.