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2 Recording Format
Recording Parameters
Table
Table 2-1 Recording parameters
Parameter | Tape drives reading and writing in this physical format: | |||
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8500/8500ca | 8200c | 8200 | ||
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Tape width | 8.00 mm | 8.00 mm | 8.00 mm | |
| (0.315 in) | (0.315 in) | (0.315 in) | |
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Track length | 62.651 mm | 62.651 mm | 71.628 mm | |
(data + servo)b | (2.47 in.) | (2.47 in) | (2.82 in) | |
Tracks per | 2 | 1 | 1 | |
revolutionc |
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Track pitch | 15.5 μm | 31.0 μm | 31.0 μm | |
| (0.000610 in) | (0.001221 in) | (0.001221 in) | |
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Track width | 15.5 μm | 25.0 μm | 25.0 μm. | |
| (0.000610 in) | (0.000984 in) | (0.000984 in) | |
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Track density | 64.506 trk/mm | 32.253 trk/mm | 32.254 trk/mm | |
| (1638.455 trk/in) | (819.226 trk/in) | (819.253 trk/in) | |
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Areal recording | 144.23 Mfc/mm2 | 72.115 Mfc/mm2 | 68.68 Mfc/mm2 | |
density | (93.052 Mfc/in2) | (46.526 Mfc/in2) | (44.312 Mfc/in2) | |
Drum speed | 1831.055 rpm | 1831.055 rpm | 1922.607 rpm | |
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Tape speed | 11.079 mm/sec | 11.079 mm/sec | 11.633 mm/sec | |
| (0.436 ips) | (0.436 ips) | (0.458 ips) | |
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Track angle | 4.9 degrees | 4.9 degrees | 4.9 degrees | |
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Wrap angle | 221 degrees | 221 degrees | 221 degrees | |
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a
bIn 8200c and 8500/8500c formats, servo information is embedded in three places along the length of the track. In 8200 format, servo information is embedded at the beginning of the track.
cTracks per revolution is the number of tracks written or read for each revolution of the rotating drum assembly.
May 1994 | ||
| (Standard and XL) |
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