In November 1988, NEC announced the N7645 cartridge library system which could store up to a maximum of 6,250 1/2-inch wide cartridge magnetic tapes, each with a capacity of 200MB.
Cartridge library systems ranging in size from 1350 to 6250 tapes (memory capacity 270–1250GB) could be configured by combining cartridge stockers having 650–800 cells (for cartridge storage) and two tape drives per unit. The system achieved a data transfer speed of 3MB/s (speed at the input/output channel was 4.5MB/s).
| Media specifications | Width 1/2inch,Length 540feet,18tracks,Capacity approx. 200MB |
|---|---|
| Cartridge dimensions(mm) | 109(W)×125(D)×25.4(H) |
| Recording density(byte/inch) | 38000 |
| Tape speed(m/s) | 2 |
| Rewind time(s) | 48max. |
| Data transfer speed(MB/s) | 3(4.5 was also possible at the channel level) |
| Number of stored cartridges | 1350–6250 |
| Max. memory capacity (GB) | 270–1250 |
| Load/unload time (s) | 8 |
| Mount/demount time (s) | Average 16 |
| External dimensions(mm) with largest configuration | 14500(W)×840/1240(D)×1790(H) |
