Generations
| Generation | TR-1 | TR-3 | TR-4 | TR-5/NS20 | TR-7 |
|---|---|---|---|---|---|
| Release date | 1995 | 1995 | 1997 | 1998 | 2002 |
| Data capacity | 400 MB | 1.6 GB | 4 GB | 10 GB | 20 GB |
| Max speed (MB/s) | 0.25 | 0.5 | 1.2 | 2 | 4 |
| Media format | QIC-80 | QIC-3020 | QIC-3095 | QIC-3220-MC | Travan 640 |
| Min tape length (ft) | 750 | 750 | 740 | 740 | 750 |
| Tape tracks | 36 | 50 | 72 | 108 | 108 |
| Encoding | RLL(1,7) | VR2 (PRML) | |||
| Tape type | Co-gFe2O3 | Metal Particle | |||
| Coercivity (Oe) | 550 | 900 | 900 | 1650 | 1650 |
| Recording density (ftpi) | 14,700 | 44,250 | 50,800 | 79,800 | 96,000 |
| Data density (bpi) | 67,733 | 106,400 | 192,000 |
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Famous quotes containing the word generations:
“Books have their destinies like men. And their fates, as made by generations of readers, are very different from the destinies foreseen for them by their authors. Gulliver’s Travels, with a minimum of expurgation, has become a children’s book; a new illustrated edition is produced every Christmas. That’s what comes of saying profound things about humanity in terms of a fairy story.”
—Aldous Huxley (1894–1963)
“The mode of founding a college is, commonly, to get up a subscription of dollars and cents, and then, following blindly the principles of a division of labor to its extreme,—a principle which should never be followed but with circumspection,—to call in a contractor who makes this a subject of speculation,... and for these oversights successive generations have to pay.”
—Henry David Thoreau (1817–1862)
“There should be a sympathy with freedom, a desire to give it scope, founded not upon visionary ideas, but upon the long experience of many generations within the shores of this happy isle, that in freedom you lay the firmest foundations both of loyalty and order.”
—W.E. (William Ewart)