Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ANSI INCITS 341:2000
• Năm ban hành / Publication date: 2000
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Information Technology – 25 - 4 mm (1 in) Type DCRsi Recorded Instrumentation – Digital Cartridge Tape Format
• Số trang / Page: 83

Phạm vi áp dụng / Scope of standard

This standard establishes the format of information on 25.4 mm (1 in) type DCRsi instrumentation digital cartridges. It specifies the dimensions and locations of the transverse scan data and pilot tone track, the control track and the longitudinal data track. It defines the formatting, randomizing, ECC, and other recording requirements of the data blocks forming the transverse data record, containing user data and other associated data and specifies the content, format, and recording method for the control record to ensure that a compliant recorder will be able to reproduce the recorded tape. This standard also specifies the recording requirements for the longitudinal records contained in the longitudinal data tracks. Additionally this standard specifies the prerecord and post-record zones of the transverse scan tracks and the longitudinal data track. The physical requirements, magnetic requirements and test methods for the magnetic tape and tape cartridge are also specified in this standard. All dimensions given are metric with their corresponding U.S. customary engineering units (similar to British Imperial units) shown in parentheses.

Purpose

The purpose of this standard is to ensure a direct and unique correspondence between user data (as defined in this standard) and the format recorded on tape. In order to ensure data interchange using this standard, it is necessary for interchange parties to agree upon performance levels and source data format. This standard is distinct from a specification in that it delineates a minimum of restrictions consistent with compatability in media and information interchange transactions.

The performance levels contained in this standard represent the minimum acceptable levels of performance for interchange purposes. They, therefore, represent the performance levels that the interchange items should meet or surpass during their useful life and, thus, define end-of-life criteria for interchange purposes. The performance levels in this standard are not intended to be employed as substitute for purchase specifications.

Wherever feasible, quantative performance levels that shall be met or exceeded in order to comply with this standard are given. In all cases, including those in which quantative limits for requirements falling within the scope of this standard are not stated, but left to agreement between interchange parties, standard test methods and measurement procedures shall be used to determine such limits.

Except as noted above, the interchange parties complying with the applicable standards should be able to achieve compatibility without the need for additional exchange of technical information.