ISO/IEC 8441-1-1991 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

标准号：ISO/IEC 8441-1-1991
中文标准名称：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
英文标准名称：Information technology; high density digital recording (HDDR); part 1: unrecorded magnetic tape for (HDDR) applications
标准类型：L64;G83
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：L64;G83
国际标准分类号：35.220.22
适用范围：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 μm (0,001 in); b) longitudinal magnetic orientation; c) coercivity 72 kA/m (900 Oe) max. These tapes are suitable for interchange in accord-ance 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 re-cording heads. Different categories of environmental conditions and their effects on tape are dealt with in annex C. Severe operating conditions are con-sidered 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/IEC 8441, may not comply with the re-quirements 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 un-suitable for a biasless system.