Power-Down Sequence; Auto-Park; Power Management - Seagate MEDALIST 1080SL Product Manual

Medalist 1080sl SCSI Product Manual, August 1995
5. 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 becomes ready.

1.6.2 Power-down sequence

The following typical power-down sequence is provided to assist in
evaluating drive performance. This information does not constitute a
specification or a performance guarantee.
1. The power cable is unplugged from the drive, or the drive receives a
command to spin down.
2. Within 3 seconds after the motor begins to spin down, the actuator
lock engages, producing a sound.
3. The spindle stops within 15 seconds, whether the power cable is
unplugged from the drive or the drive receives the power-down
command.

1.6.3 Auto-park

Upon power-down, the read/write heads automatically move to the
landing zone. The heads park beyond the maximum data cylinder. When
power is applied, the heads recalibrate to track 0.
Caution. Do not move the drive until the spindle motor has come to a
complete stop; otherwise, you may damage the drive.

1.7 Power management

The drive supports power-management modes that reduce its overall
power consumption. The drive automatically changes 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 below.
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.
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