Voltage Tolerance; Power-Management Modes - Seagate Surveillance HDD Product Manual

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2.8.3

Voltage tolerance

Voltage tolerance (including noise):
• 5V ±5%
• 12V ±10%
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:
Power modes
Active
Idle
Standby
Sleep
• 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 transi-
tion to Standby mode. In both Idle and Standby mode, the drive accepts all commands and returns to Active mode when disk access
is necessary.
Seagate Surveillance HDD Product Manual, Rev. B (Draft 2)
Heads
Tracking
Tracking
Parked
Parked
Spindle
Rotating
Rotating
Stopped
Stopped
Drive Specifications
Buffer
Enabled
Enabled
Enabled
Disabled
12