Seagate Enterprise NAS HDD +SRS Product Manual, Rev. B
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2.8.4
Power-management modes
The drive provides programmable power management to provide greater energy efficiency. In most systems, users can control power
management through the system setup program. The drive features the following power-management modes:
• Active mode
The drive is in Active mode during the read/write and seek operations.
• Idle mode
The buffer remains enabled, and the drive accepts all commands and returns to Active mode any time disk access is necessary.
• Standby mode
The drive enters Standby mode when the host sends a Standby Immediate command. If the host has set the standby timer, the
drive can also enter Standby mode automatically after the drive has been inactive for a specifiable length of time. The standby timer
delay is established using a Standby or Idle command. In Standby mode, the
drive buffer is enabled, the heads are parked and the
spindle is at rest. The drive accepts all commands and returns to Active mode any time disk 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 Standby 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 specified delay times to zero. If the standby timer reaches zero before any drive activity is required, the drive makes a tran-
sition to Standby mode. In both Idle and Standby mode, the drive accepts all commands and returns to Active mode when disk
access is necessary.
2.9
Environmental specifications
This section provides the temperature, humidity, shock, and vibration specifications for Desktop HDDs. Ambient temperature is defined
as the temperature of the environment immediately surrounding the drive. Above 1000ft. (305 meters), the maximum temperature is
derated linearly by 1°C every 1000 ft. Refer to
for base plate measurement location.
2.9.1
Ambient Temperature (drive case temperature)
2.9.2
Temperature gradient
Power modes
Heads
Spindle
Buffer
Active
Tracking
Rotating
Enabled
Idle
Tracking
Rotating
Enabled
Standby
Parked Stopped
Enabled
Sleep
Parked
Stopped
Disabled
Operating
0° to 70°C (32° to 158°F)
Non-operating
–40° to 70°C (–40° to 158°F)
Operating
20°C per hour (68°F per hour max), without condensation
Non-operating
30°C per hour (86°F per hour max)
