Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ANSI INCITS/ISO/IEC 15521:1998
• Năm ban hành / Publication date: 1998
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Information technology - 3,81 mm wide magnetic tape cartridge for information interchange - Helical scan recording - DDS-3 format using 125 m length tapes
• Số trang / Page: 106

Phạm vi áp dụng / Scope of standard

This International Standard specifies the physical and magnetic characteristics of a 3,81 mm wide magnetic tape cartridge to enable physical interchangeability of such cartridges between drives. It also specifies the quality of the recorded signals, the recording method and the recorded format - called Digital Data Storage (DDS) - thereby allowing data interchange between drives by means of such magnetic tape cartridges.

Information interchange between systems also requires, at a minimum, agreement between the interchange parties upon the interchange code(s) and the specifications of the structure and labelling of the information on the interchanged cartridge.

Under information interchange circumstances in which a processing algorithm, e.g. for lossless data compression as specified in ISOLEC 11558, is applied to the host data prior to recording on the tape and a complementary reprocessing algorithm is applied after the data is read from the tape, agreement upon these by the interchange parties is also required.