Power Specifications; Power Management - Seagate ST9655 Series Product Manual

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1.11.6.2 Nonoperating vibration
The following table lists the maximum nonoperating vibration that a
ST9655 family drive can experience without incurring physical damage
or degradation in performance when the drive is operated.
5–22 Hz 0.162-inch displacement (double amplitude)
22–450 Hz 4 Gs acceleration (peak)
450–22 Hz 4 Gs acceleration (peak)
22–5 Hz 0.162-inch displacement (double amplitude)

1.12 Power specifications

ST9655 family drives receive DC power (+5V) through pin 41 and pin 42
of the ATA interface connector.

1.12.1 Power management

Power management is required for low-power and portable computer
systems. In most systems, you can control power management through
the system setup program. The ST9655 family drives feature several
power-management modes, which are described briefly below:
Active mode. The drive is in Active mode during the read/write and seek
operations.
Idle mode. At power-on, the drive sets the idle timer to enter Idle mode
after 5 seconds of inactivity. You can set the idle timer delay using the
system setup utility. In Idle mode, the spindle remains up to speed. The
heads are parked away from the data zones for maximum data safety.
The buffer remains enabled, and the drive accepts all commands and
returns to Active mode any time disc access is necessary.
Standby mode. The drive enters Standby mode when the host sends a
Standby Immediate command. If the standby timer has been set by the host
system, 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 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 it receives a Sleep
Immediate command from the host. The heads are parked and the
spindle is at rest. The drive leaves Sleep mode after it receives a Hard
ST9655 Family Product Manual, Rev. A