信息技术 高密度数字记录(HDDR) 第1部分:HDDR应用的未记录磁带

[中文适用范围]： ISO/IEC 8441 的这一部分规定了针对高密度数字记录 (HDDR) 设计的未记录磁带的要求，具有以下特性： a) 标称厚度 25.4 μm（0.001 英寸）； b) 纵向磁取向； c) 矫顽力最大 72 kA/m (900 Oe)这些胶带适合根据 ISO/IEC 8441-2 进行互换。 还包括包装要求。 注 1：矫顽力高于 32 kA/m（400 Oe）的磁带通常被归类为高能磁带，用户应与驱动它们的设备建立兼容性。 附录 A 提供了有关玻璃和金属法兰卷盘的指南。 附录 B 提供了有关录音头磨损的信息。 附件 C 讨论了不同类别的环境条件及其对胶带的影响。 附件 D 考虑了严酷的操作条件。 附件 E 讨论了表面电阻测试。 附件 F 描述了胶带耐磨性测试技术。 附录 G 中给出了参考文献列表。 注 2 公认的是，档案交换磁带或在 ISO/IEC 8441 本部分发布之前使用的系统所生产的磁带可能不符合要求，并且/或此处的建议。 3 本文中的各种测试和程序是指使用交流高频偏压进行记录。 实际上，某些 HDDR 系统不使用偏置。 ISO/IEC 8441 本部分中使用偏压并不意味着所测试的磁带不适合无偏压系统。 [外文原描述]： This part of ISO/IEC 8441 specifies requirements for unrecorded magnetic tape designed for high density digital recording (HDDR) having the following characteristics: a) nominal thickness 25,4 urn (0,001 in); b) longitudinal magnetic orientation; c) coercivity 72 kA/m (900 Oe) max. These tapes are suitable for interchange in accordance with ISO/IEC 8441-2. Requirements for packaging are also included. NOTE 1 Tapes of coercivity above 32 kA/m (400 Oe) are usually classified as high energy tapes and users should establish compatibility with equipment used for driving them. Annex A gives guidance on glass and metal-flanged reels. Annex B gives information on the wear of recording heads. Different categories of environmental conditions and their effects on tape are dealt with in annex C. Severe operating conditions are considered in annex D. Surface electrical resistance testing is dealt with in annex E. A tape abrasivity testing technique is described in annex F. A list of bibliographical references is given in annex G. NOTES 2 It is recognized that archival interchange tapes, or those produced by systems in use prior to the publication of this part of ISO/lEC 8441, may not comply with the requirements and/or recommendations herein. 3 Various tests and procedures herein refer to recording with a.c. HF bias. In practice, certain HDDR systems do not use bias. The use of bias in this part of ISO/IEC 8441 does not imply that the tape so tested is in any way unsuitable for a biasless system.