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Environmental requirements
The following table lists the environmental specifications for the DDS Gen 5 drive.
The internal drive should meet these standards if mounted either vertically (on its
side) or horizontally (right side up).
Reliability
The DDS Gen 5 drive is designed for maximum reliability and data integrity. The
following table summarizes the reliability specifications.
28
DDS Gen 5 Tape Drive: User's Guide
Specifications
Temperature
Thermal gradient
Relative humidity
Maximum wet bulb
temperature
Altitude
Vibration
Sweep test
Acoustic level idling (A-wt
sum)
Acoustic level operational
(A-wt sum)
Shock (1/2 sine wave)
1
Mechanism and media
2
Mechanism
Specification
Nonrecoverable error rate
Error recovery and control
Mean time between failures (MTBF)
Mean time to repair (MTTR)
Operational
1
+41° to +113°F
(+5° to
+45°C)
2°C per minute (no
condensation)
20% to 80% noncondensing
82.4°F (28°C)
-100 to +4,575 meters
1.20 mm peak-to-peak
(5-17 HZ)
0.73 G peak (17 to 150 Hz)
0.50 G peak (150-500 Hz)
(sweep rate 8 decades per
hour)
47 dBA maximum
53 dBA maximum
10 Gs peak, 11 msec
Value
15
< 1 in 10
Error-correction code techniques (C1, C2, &
C3 ECC)
Read-aftew-write (RAW)
N-group writing
412,000 hr at 20% duty cycle
Less than 0.5 hour
Nonoperational
2
-40° to +149°F
Below condensation
1
0% to 90% noncondensing
No condensation
-300 to +15,200 meters
(power on)
1.5 g (5 to 500 Hz)
-
-
-
0
0
100 Gs peak, 11 msec
bits
2
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