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Hitachi Lightning 9900™ User and Reference Guide 111
5.7 Environmental Specifications and Requirements
5.7.1 Temperature and Humidity Requirements
Table 5.17 lists the temperature and humidity requirements for the 9900 subsystem. The
recommended operational room temperature is 70–75°F (21–24°C). The recommended
operational relative humidity is 50% to 55%.
Table 5.17 Temperature and Humidity Requirements
Operating
*1
Non-Operating
*2
Shipping & Storage
*3
Parameter Low High Low High Low High
Temperature °F (°C) 60 (16) 90 (32) 14 (-10) 109 (43) 5 (-25) 140 (60)
Relative Humidity (%)
*4
20 - 80 8 - 90 5 - 95
Max. Wet Bulb °F (°C) 79 (26) 81 (27) 84 (29)
Temperature Deviation
°F (°C) / hour
18 (10) 18 (10) 36 (20)
Notes:
*1. Environmental specification for operating condition should be satisfied before the disk subsystem is powered on. The
maximum temperature of 90°F (32°C) should be strictly satisfied at the air inlet portion of the subsystem. The recommended
temperature range is 70-75°F (21-24°C).
*2. This includes both packing and unpacking conditions unless otherwise specified.
*3. During shipping or storage, the product should be packed with factory packing.
*4. No condensation in and around the drive should be observed under any conditions.
5.7.2 Power Consumption and Heat Output Specifications
Table 5.18 lists the power consumption and heat output parameters for the 9900 control
frame and array frames. These data generally apply to both 60-Hz and 50-Hz subsystems.
Table 5.19 lists the power consumption and heat output parameters for the various
configurations of the 9900 subsystem.