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Medalist 17242, 13032, 10232, 8422 and 4312, Rev. A 9
Operating power and current are measured using 40 percent random
seeks, 40 percent read/write mode (1 write for each 10 reads), and 20
percent drive inactive.
Idle mode power is measured with the drive up to speed, with servo
electronics active, and with the heads in a random track location.
During Standby mode, the drive accepts commands, but the drive is not
spinning, and servo and read/write electronics are in power-down mode.
1.7.1.1 Typical current profile
Figure 1 shows a typical current profile.
Figure 1. Typical startup and operation current profile
Mode Typical Watts RMS Typical Amps RMS
5V 12V
Spinup — 0.6 (Peak) 2.2 (Peak)
Seek
(Random,
no read/write)
8.5 0.5 0.5
Read/Write 5.5 0.5 0.25
Operating 7.3 0.5 0.4
Idle 5.5 0.5 0.25
Standby 1.08 0.2 0.007
Sleep 1.08 0.2 0.007
Time (seconds)
6
5
4321078 9 10
0
0.5
1.0
1.5
2.0
Current (Amps)