Product manual

3.
Within 250 msec after power is applied, the drive responds to the Test
Unit Ready, Request Sense, Mode Sense and Inquiry commands.
4.
The drive begins to lock in speed-control circuits.
6.
The actuator lock releases the actuator.
7.
The spindle motor reaches operating speed in about 5 seconds. After
5 seconds, there are no speed variations.
8.
The drive performs velocity-adjustment seeks.
9.
The drive seeks track 0 and is then ready.
1.7.2 Power-down sequence
Caution.
Do not move the drive until the motor has come to a complete
stop.
1.
The power is turned off.
2.
Within 15 seconds, the drive spindle stops rotating.
3.
The read/write heads automatically move to the landing zone, which
is inside the maximum data cylinder.
4.
The magnetic acuator lock mechanism locks the arm. This completes
the power-down sequence.
1.7.3 Auto-park
During power-down, the read/write heads automatically move to the
landing zone. The heads park inside the maximum data cylinder and the
magnetic actuator lock engages. When power is applied, the heads
recalibrate to track 0.
1.8 Power management
The drive supports power-management modes that reduce its overall
power consumption. They automatically change from one mode to
another in response to interface activity. You do not need to change any
parameters or send any special commands to make the drive change
modes. The power-management modes are described as follows:
•
Spinup.
Spinup is defined as the period during which the spindle is
coming up to operating speed. The power consumed in this mode is
equivalent to the average power during the first 10 seconds after the
drive begins to spin up.
8 Medalist Pro 2160N/ 2160WC Product Manual, Rev. A