Capacity: 650 Megabytes per Cartridge

MB- ECMA-239.DOC- 07.08.96 12,08Brief History ECMA Technical Committee TC31 was established in 1984 for the standardization of Optical Disk Cartridges (ODCs). Since its establishment, the Committee has made major contributions to ISO/IEC JTC1/SC23 toward the development of International Standards for 90 mm, 120 mm, 130 mm and 300 mm ODCs. Numerous ODC standards have been developed by ECMA TC31 and published as ECMA Standards, many of which have been adopted by ISO/IEC under the fast track procedure. In April 1995 a group of three companies proposed to ECMA the development of a new standard with ECMA TC31 for 90 mm ODCs using a format known as “Hyper-Storage (HS-1) ” and having a storage capacity of 650 Megabytes per cartridge. Receiving unanimous support from its members, ECMA TC31 began work to bring the specification into a form suitable for an ECMA Standard. The 1st draft standard was introduced at the July 1995 meeting of TC31 held in Sapporo, Japan. The standard was evolved through six subsequent drafts, culminating in the production of this final draft during April 1996. During that process, according to ECMA TC31 operating guidelines, all technical requirements of this standard were verifie