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ECMA-45

Data interchange on magnetic 12-disk packs (100 Mbytes)

1st edition, September 1975

A gross information capacity of 100 million 8-bit bytes is achieved in this 12-disk pack by the use of 19 data disk surfaces. Data is recorded on 404 tracks per data surface.

The track spacing gives approximately 8 tracks per mm, each containing a maximum of 13030, 8-bit bytes of information. The recording density varies between outer and inner track and reaches a maximum of 159 bpmm on the innermost track.

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Technical CommitteeThis TC is no longer active