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10
Environmental requirements
The following table lists the environmental specifications for the Viper drive mechanism.
Injected noise
Reliability
Specification
Temperature
Airflow requirements
Thermal gradient
Relative humidity
Humidity gradient
Maximum wet bulb temp.
Altitude
Shock (1/2 sine wave)
Vibration (Sweep Test)
Acoustic level idling
(A-wt sum)
Acoustic level operational
(A-wt sum)
The internal drive will operate without degradation of error rates with 100 mV of noise
injected between the chassis and 0 V at the power connector at any frequency
between 45 Hz and 10 MHz.
The Viper drive is designed for maximum reliability and data integrity. The following
table summarizes the reliability specifications.
Specification
Non-recoverable error rate
Error recovery and control
Mean time between failures
(MTBF)
Cartridge load/unload
Mean time to repair (MTTR)
Operational
+50° to +104°F
(+ 10° to + 40°C)
Internal: 9 CFM (front to back)
11°C per hour (10-40°C)
20% to 80% non-condensing
10% per hour
78.8°F (26°C)
max 10,000 feet MSL (at 25°C)
2 Gs peak, 10 msec
0.01 inches DA (5-22 Hz)
0.50 G peak (22–500 Hz)
sweep rate 5-500Hz (1 oct/min)
38 dBA maximum
5.0 LwA Bels
41 dBA maximum
5.5 LwA Bels
Description
17
< 1 in 10
bits
- Error-correction code techniques (C1 and C2 ECC)
- Read-after-write (RAW)
- Error monitoring and reporting (error log)
- Retry on read
250,000 hours MTBF at 100% duty cycle: power
applied and tape moving continuously
(External drive; 50,000 hours at full load and 25°C)
300,000 cartridge load/unload cycles (no thread)
Less than 0.5 hour
Viper 200 LTO Product Manual
Non-operational
–40° to +149°F
(–40° to + 66°C)
11°C per hour (10-40°C)
10% to 95% non-condensing
10% per hour
No condensation
40,000 feet (power off)
10 Gs peak, 10 msec
1.0 G (5-500Hz;
sweep rate 0.5 oct/min)
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