NEC N8151-60, Руководство пользователя

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106 Specification
Specifications
The Built-In AIT has the following specification:
■
Performance
Memory capacity • 40 GB (in compression mode: 80 GB)
when using AIT1 Turbo Data Cartridge: tape length
186 m
• 35 GB (in compression mode: 70 GB)
when using AIT1 Data Cartridge: tape length 230 m
• 25 GB (in compression mode: 50 GB)
when using AIT1 Data Cartridge: tape length 170 m
The compression mode value presumes the compres-
sion ratio is 2:1. The actual value depends on patterns
in the data.The memory capacity requirement is
conservative, and may be somewhat smaller depend-
ing on memory usage conditions.
Bit error rate 10 -17 or less
Data transfer rate
• AIT-1 Turbo: 6 MB/s
• AIT-1: 4 MB/s
The internal transfer rate depends on the system
environment of the host machine.
IDE transfer rate
Ultra DMA mode 5: 100 Mbytes/second
Ultra DMA mode 4:66.6 Mbytes/second
PIO transfer mode 4:16.6 Mbytes/second
PIO transfer mode 0:3.33 Mbytes/second
Note: The mode used depends on the connected host.
Also, the internal transfer rate may change
depending on the selected mode.
Initialize time Less than 5 seconds
Load time Average 80 seconds
when using AIT-1 Turbo Data Cartridge (tape length:
186 m)
Average 14 seconds
when using AIT-1 Data Cartridge (tape length: 230 m,
170 m)
Unload time Average 25 seconds
when using AIT-1 Turbo Data Cartidge (tape length:
186 m)
Average 20 seconds
when using AIT-1 Data Cartridge (tape length: 230 m,
170 m)