Power-Down Sequence; Auto-Park; Power Specifications; Power Management - Seagate Medalist 1270 Product Manual

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1.9.2 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 3 seconds, the motor begins to spin down.

3. The read/write heads automatically move to the shipping zone, which

is inside the maximum data cylinder.

4. The magnetic actuator-lock locks the arm. This completes the power-

down sequence.

Upon 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.

The drive supports Active, Idle and Standby power-management modes.

The power-management commands that the drive supports are listed in

the table on page 27. The table on page 12 shows the average typical

power consumption rates for each power-management mode. The test

criteria for each mode is defined below. The Idle and Standby timers are

disabled at the factory.

All measurements were taken at the drive's power connector. A true RMS

meter is used to measure all modes except Standby. A DMM is used for

Standby measurements.

1.11.1.1 Active mode

During the Active mode, the drive is involved in spinup, seeking or

read/write activities. The table shows the typical power-consumption

rates for these activities.

• Spinup. Spinup mode is entered from the Standby mode. The drive

brings the spindle and discs up to operating speed. Power in this mode

is defined as the peak power after starting spinup.

Medalist 1270 Product Manual, August 1995

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