Auto-Park; Power Specifications; Power Consumption - Seagate Decathlon 850 Product Manual

8

1.8.3 Auto-park

Upon power-down, the read/write heads automatically move to the
shipping 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.

1.9 Power specifications

1.9.1 Power consumption

The ST5850A supports Active, Idle and Standby power-management
modes. The power-management commands the drive supports are listed
in the command set table on page 27. The following table shows the
average typical power consumption rates for each power-management
mode. The test criteria for each mode is defined in the section following
the table. 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.
Spinup Seeking
Current at +12V
Amps peak
RMS amps typ
Watts typ
Current at +5V
RMS amps typ
Watts typ
Power
Total watts typ
1.9.1.1 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.
Decathlon 850 ATA Product Manual, July 1995
Read/
write
1.1 — —
— 0.408 0.231
— 4.896 2.772
— 0.420 0.445
— 2.100 2.225
— 7.00 5.00
Idle Standby
— —
0.158 0.014
1.896 0.168
0.240 0.166
1.200 0.830
3.10 1.00