Hitachi 7K250 Specifications - Page 42

6.2 Environment 6.2.1 Temperature and humidity Table 20: Temperature and humidity Operating conditions Temperature Relative humidity Maximum wet bulb temperature Maximum temperature gradient Altitude 5C to 55ºC (See note below) 8 to 90%, non-condensing 29.4ºC, non-condensing 15ºC/hour -300 to 3,048 m Non-operating conditions Temperature Relative humidity Maximum wet bulb temperature Altitude -40C to 65ºC 5 to 95%, non-condensing 35ºC, non-condensing -300 to 12,000 m Notes: • The system is responsible for providing sufficient ventilation to maintain a surface temperature below 60°C at the center of the top cover of the drive. • Noncondensing conditions should be maintained at any time. • Maximum storage period within shipping package is one year. Relative Humidity (%) 100 90 80 70 60 50 40 30 20 10 0 -4 5 N on -op era tin g 3 1 'C /9 0 % 3 6 'C /9 5 % W e tB u ib = 3 5 .0 'C W e tB u ib = 2 9 .4 'C O p e ra tin g 5 5 'C /1 5 % 6 5 'C /1 4 % -3 5 -2 5 -1 5 -5 5 15 25 35 45 55 65 T em p era tu re ('C ) Figure 5: Limits of temperature and humidity Deskstar 7K250 Hard Disk Drive Specification 28