Figure 1. Typical 5V Startup And Operation Current Profile - Maxtor DiamondMax 21 Manual

• Operating power and current
Operating power is measured using 40 percent random seeks, 40 percent read/write mode (1 write for each
10 reads) and 20 percent drive idle mode.
• Idle mode power
Idle mode power is measured with the drive up to speed, with servo electronics active and with the heads in
a random track location.
• Standby mode
During Standby mode, the drive accepts commands, but the drive is not spinning, and the servo and read/
write electronics are in power-down mode.
Table 6: DC power requirements
Power dissipation
Spinup
Idle*
Idle* (with offline activity)
Operating (40% r/w, 40% seek, 20% inop.)
Seeking (random, 20% idle)
Standby
Sleep
*During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and
power to operational levels.
2.8.1.1 Typical current profiles

Figure 1. Typical 5V startup and operation current profile

DiamondMax 21 Serial ATA Product Manual, Rev. A
Avg (watts 25° C) Avg 5V typ amps
— —
9.30 0.611
10.40 0.719
13.00 0.772
12.60 0.613
0.80 0.106
0.80 0.106
Avg 12V typ amps
2.8 (peak)
0.520
0.567
0.762
0.795
0.023
0.023
17