Start/Stop Time; Typical Power-Up And Power-Down Sequence; Power-Up Sequence; Figure 1. Typical Startup Current Profile - Seagate Medalist 1270 Product Manual

Medalist 1270 Product Manual, August 1995

1.8 Start/stop time

Within 20 seconds after power is applied, the drive is ready. Within 15
seconds after power is removed, the drive spindle stops rotating.
Amps
2.0
T2
1.0
T1
0
0 1 2

Figure 1. Typical startup current profile

1.9 Typical power-up and power-down sequence

This section describes typical power-up and power-down sequences to
assist you in evaluating the drive's performance. They are not perform-
ance specifications. A typical startup current profile is shown in Figure 1.
Startup current profiles are unique for each drive.

1.9.1 Power-up sequence

1. Power is applied to the drive.
2. When power is applied, the LED is on for about 1 second.
3. The spindle motor reaches operating speed in about 4 seconds.
4. The magnetic actuator-lock releases the actuator.
5. The drive achieves final speed-control lock.
6. The heads are positioned over track 0 and the drive is ready.
T3
T4 T5
T6
3 4 5 6 7
Seconds
9
T7
8 9