Seagate STBD1000400 Momentus XT (Gen2) Product Manual - Page 18

• Idle and Standby timers Each time the drive performs an Active function (read, write or seek), the standby timer is reinitialized and begins counting down from its specified delay times to zero. If the standby timer reaches zero before any drive activity is required, the drive makes a transition to Standby mode. In both Idle and Standby mode, the drive accepts all commands and returns to Active mode when disc access is necessary. 3.10 Environmental specifications This section provides the temperature, humidity, shock, and vibration specifications for Momentus XT drives. 3.10.1 Ambient temperature Ambient temperature is defined as the temperature of the environment immediately surrounding the drive. Actual drive case temperature should not exceed 65°C (149°F) within the operating ambient conditions. Above 1000 feet (305 meters), the maximum temperature is derated linearly by 1°C every 1000 feet. Operating: Nonoperating: 0°C to 60°C (32°F to 140°F) -40°C to 70°C (-40°F to 158°F) 3.10.2 Temperature gradient Operating Nonoperating 20°C per hour (68°F per hour max), without condensation 35°C per hour (95°F per hour max), without condensation 3.10.3 Relative humidity Operating Nonoperating 5% to 95% noncondensing (30% per hour max) 5% to 95% noncondensing (30% per hour max) 3.10.4 Wet bulb temperature Operating Nonoperating 37.7°C (99.8°F max) 40°C (104°F max) 3.10.5 Altitude Operating Nonoperating -304.8 m to 3,048 m (-1000 ft to 10,000+ ft) -304.8 m to 12,192 m (-1000 ft to 40,000+ ft) 3.10.6 Shock All shock specifications assume that the drive is mounted securely with the input shock applied at the drive mounting screws. Shock may be applied in the X, Y or Z axis. 3.10.6.1 Operating shock These drives comply with the performance levels specified in this document when subjected to a maximum operating shock of 350 Gs based on half-sine shock pulses of 2 ms. Shocks should not be repeated more than one time per axis. 12 Momentus XT Product Manual, Rev. D