Environmental Tolerances; Ambient Temperature; Temperature Gradient; Relative Humidity - Seagate MARATHON 810 Product Manual

10 Marathon 810 (ST9816AG) Product Manual, August 1995
is system-dependent and is usually established using the system setup
utility. In Standby mode, the buffer remains enabled, the heads are
parked and 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
Immediate command from the host. The heads are parked and the
spindle is at rest. The drive leaves Sleep mode when a Hard Reset or
Soft Reset command is received from the host. After receiving a soft
reset, the drive exits Sleep mode and enters Standby mode with all
current emulation and translation parameters intact.
Idle and standby timers. The drive sets the default time delay for the idle
timer at power-on. In most systems, you can set this delay using the system
setup utility. Each time the drive performs an Active function (read, write or
seek), the idle and standby timers are reinitialized and begin counting down
from their specified delay times to zero. If the idle timer reaches zero before
any drive activity is required, the drive enters Idle mode. If the host has set
the standby timer, the standby countdown continues. If the host has not set
the standby timer, the drive remains in Idle mode. If the standby timer
reaches zero before any drive activity is required, the drive enters Standby
mode. In both Idle and Standby mode, the drive accepts all commands and
returns to Active mode when disc access is necessary.

1.8 Environmental tolerances

1.8.1 Ambient temperature

Operating 5° to 55°C (41° to 131°F)
Nonoperating –40° to 70°C (–40° to 158°F)

1.8.2 Temperature gradient

Operating 30°C / hr (54°F / hr) max, without condensation
Nonoperating 30°C / hr (54°F / hr) max, without condensation

1.8.3 Relative humidity

Operating 8% to 80% noncondensing (10% per hour max)
Max. wet bulb temperature: 29.4°C (85°F)
Nonoperating 8% to 80% noncondensing (10% per hour max)
Max. wet bulb temperature: 40°C (104°F)