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The IBM 3480 (two drives in front) and IBM 3420 (two drives in back) Tape Drives
The following is
the text of an IBM Information Systems Group press fact
sheet distributed on March 22, 1984.
| Characteristics |
IBM 3480 |
IBM 3420 (model 8) |
| Nominal Data Rate |
3MB/sec |
1.25MB/sec |
| Recording Density |
About 38,00 bytes/in. |
6,250 bytes/in. |
| Drive System |
Reel To Reel Servo Control |
Vacuum Columns |
Media |
½" Chromium Dioxide |
½" Iron Oxide |
| Magnetic Head |
Thin Film |
Laminated |
| Tape Container |
about 4" x 5" x 1" Cartridges |
l0-½" Reels |
| Format |
18 Tracks |
9 Tracks |
| Capacity (24K block size) |
200MB |
165MB |
| Data Buffering |
Yes (512KB) |
No |
| Microprocessor Control |
Yes |
No |
| Recommended Cleaning |
Once/Week |
Once/Shift |
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