Power Consumption; Voltage Tolerance - Seagate MEDALIST 1080SL Product Manual

8 Medalist 1080sl SCSI Product Manual, August 1995
Seeking. The servo electronics are active, and the heads are moving
to a specific location on the disc. The read/write electronics are
powered-down. The power consumed in this mode is equivalent to the
average power measured while executing random seeks with a 2-
revolution (26.6 msec) dwell between seeks. The drive enters this
mode from the Idle mode.
Read/Write. The drive is reading or writing. All electronics are active
and the heads are on track.
Idle. The motor is up to speed and the drive is in track follow mode.

1.7.1 Power consumption

Values in the table below were measured at the drive power connector
with an RMS DC ammeter. The terminating resistors are disabled, and
terminator power is supplied through the SCSI connector. All values are
measured 10 minutes after the drive spins up except as noted.
During
Spinup
Current at +12V
Amps peak 1.32
RMS amps typ —
Watts typ —
Current at +5V
RMS amps typ —
Watts typ —
Power
Total watts typ —

1.7.2 Voltage tolerance

Voltage tolerance
(including noise)
Read/
Seeking Write
— —
0.393 0.221
4.72 2.65
0.477 0.498
2.39 2.49
7.11 5.14
+5V +12V
5% 5%
Idle
—
0.219
2.63
0.471
2.36
4.99