U10 Family Product Manual, Rev. A 11
established using a Standby or Idle command. In Stand by mode, the
drive buffer is enabled, the heads are parked an d the spindle is at rest.
The drive accepts all commands and returns to Active mode any time
disc access is necessary.
•Sleep mode
The drive enters Sleep mode after receiving a Sleep command from
the host. In Sleep mode, the drive buffer is disabled, the heads are
parked and the spindle is at rest. The drive leaves Sleep mode after
it receives a Hard Reset or Soft Reset from the host. After receiving a
reset, the drive exits Sleep mode and enters Active mode with all
current translation parameters intact.
•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 specifie d
delay times to zero. If the standby timer reaches zero before any d rive
activity is required, the drive makes a transition to Standby mode. In both
Idle and Standby mode, the drive accepts all commands and retu rns to
Active mode when disc access is necessary.
1.8 Environmental tolerances1.8.1 Ambient temperature
Ambient temperature is defined as the temperature of t he env iron men t
immediately surrounding the drive. Actual drive case tem perature should
not exceed 65°C (149°F) within the operating ambient conditions. Rec-
ommended measurement locations are shown in Figure 3 on p age 20.
Above 1,000 feet (305 meters), the maximum temperature is der ated
linearly to 112°F (44°C) at 10,000 feet (3,048 meters).
1.8.2 Temperature gradient
Operating 0° to 60°C (32° to 131°F)
Nonoperating –40° to 70°C (–40° to 158°F)
Operating/Nonoperating 20°C/hr (36 °F/hour) max,
without condensation