5.15 19MM (D1 and D2)
Description
This article is from the storage FAQ part1, by Rodney D. Van Meter with numerous contributions by others.
5.15 19MM (D1 and D2)
19mm is 3/4 inch helical scan tape. Two varieties exist, D1 and D2.
Both originated from broadcast and/or data recorder applications,
where the data/signal was analog in nature. They have been modified
for digital use, with error correcting capabilities added.
Data rates are in the 8-45 MByte/sec range, with storage capacities
in the 25-175 GB range in physically different size cartridges with
different length tapes, but all fitting into the same tape drive unit.
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