The H-8487-A10 was a medium-speed open reel magnetic tape unit which kept the same performance as previous equipment, while greatly reducing size and weight (1/3 of the previous values), conserving energy (1/2 of the previous usage) and eliminating space used by the controller. This was achieved by miniaturizing the running system, using general-purpose processors in the magnetic tape unit (drive) and developing special-purpose LSI. The unit was first shipped in October 1980.
Notable features of this unit were:
- 1) Greater compactness and lighter weight
- The system was smaller and lighter than previous systems, with 25% less floor area, 20% lower height and 65% lower weight.
- 2) Greater energy conservation
- Power consumption of the unit was examined in detail, and dramatically reduced (40–50%) compared to previous models. This was done by selecting optimal systems and parts.
- 3) High-reliability
- Special-purpose LSI improved reliability, and better maintainability was achieved by improving diagnostic functions.
In addition to the H-8487-A10, Hitachi also developed the H-8486-A10 and H-8467-A10 as units in the same family.
| Model name | H-8487-A10 | H-8487-1 (reference) |
H-8486-A10 | H-8467-A10 |
|---|---|---|---|---|
| Magnetic tape used | Width 1/2inch,Length 2400feet | |||
| Number of tracks | 9 | |||
| Recording density(BPI) (Recording system) |
6250/1600 (GCR/PE) |
1600/800 (PE/NRZ-1) |
||
| IBG (inch) | 0.3/0.6 | 0.6 | ||
| Tape speed (inch/s) | 125 | 80 | 125 | |
| Data transfer speed (KB/s) | 780/200 | 500/128 | 200/100 | |
| Tape drive system | Single capstan,vacuum column system | |||
| Rewind time (s) | 80 | 45 | 110 | 80 |
| Power consumption (KVA) | 1.5 | 2.8 | 1.5 | 1.5 |
| External dimensions Height×Width×Depth(mm) |
1400× 560×700 *1 |
1680× 770×750 |
1400× 560×700 *1 |
1400× 560×700 *1 |
| Weight (kg) | 150 | 450 | 150 | 150 |
*1: Includes controller
