Seagate Medalist 1640, Product Manual

Page: 19 / 48

1.8.1.2 Idle mode
The motor is up to speed, the servo electronics are inactive and the heads
are in the landing zone. A time delay is encountered when executing a
command that requires disc access.
The drive enters Idle mode when the host issues an Idle, Idle Immediate
or Idle and Set Idle Timer command. The Idle timer is a Seagate-unique
command and is disabled by the factory. It is discussed in Section 3.2.3
on page 33.
1.8.1.3 Standby mode
Standby mode is entered from the Idle mode. The drive is fully operational
through the interface and accepts commands, but a latency will occur if
any command received requires disc access or actuator movement. In
Standby mode, the spindle is stopped, the heads are parked in the
landing zone, the actuator is latched and some of the drive electronics
are powered down.
1.8.1.4 Sleep mode
The spindle is stopped, the heads are parked in the landing zone, the
actuator is latched and the interface and some of the drive electronics
are powered down. The drive exits Sleep mode when the computer
issues a hard or soft reset. The drive returns to Standby mode when the
computer issues a soft reset.
1.8.2 Voltage tolerance
+5V +12V
Voltage tolerance
(including noise)
±
5%
±
5%
1.8.3 Input noise
+5V +12V
Input noise frequency
(max) 25 MHz 25 MHz
Input noise
(max, peak-to-peak) 100 mV 240 mV
Medalist 1640 and 2140 Product Manual, January 1996 11