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10
Medalist SL Family Product Manual, June 1996
1.7 Power specifications
1.7.1 Power consumption
The drives support Active, Idle, Standby and Sleep power-management
modes. The power-management commands the drives support are listed
in the table on page 27. The table below shows the average typical power
consumption rates for each power-management mode. Each mode is
defined in the section following the table.
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
1.100
RMS amps typ
0.635
Watts typ
7.62
Current at +5V
RMS amps typ
0.266
Watts typ
1.33
Power
Total watts typ
8.95
1.7.1.1 Active mode
During the Active mode, the drive is involved in spinup, seeking or
read/write 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 measured from power-on to the time the drive is ready for normal
operation.
• Seeking. Seek mode is entered from Idle mode. The read/write heads
are moved to a specific location on the disc surface in preparation for
reading from or writing to the disc. Typical power is defined as the
power average of executing random seeks with a 2-revolution (22.2
msec) dwell between Seek commands.
Read/
write
Idle
—
—
—
0.385
0.242
0.220
4.62
2.90
2.64
0.380
0.400
0.143
1.90
2.00
0.72
6.52
4.90
3.36
Standby
—
0.019
0.23
0.096
0.48
0.71
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