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4-6 Maxtor Atlas 10K V
4.5.3 Drive Power Dissipation
Table 4-5 lists the drive power dissipation and the corresponding currents for the
various modes of operation of the Maxtor Atlas 10K V hard disk drive.
Table 4-5 Power Dissipation in Various Modes (Low-Profile Drives)
Note:
1. Current is RMS except for Startup. Startup current is the peak (> 10 ms)
current required during spindle startup. Current measurements do not
include power required for SCSI termination.
2. Idle mode is in effect when the drive is not reading, writing, seeking, or
executing any commands. A portion of the R/W circuitry is powered
down, the motor is up to speed and the Drive Ready condition exists.
3. Max Workload: Maximum workload is defined as a random read/write
profile with a 50% read and 50% write distribution. The transfer length is 8
blocks (4KB), and a queue depth of 4 is used.
4. Power requirements reflect nominal values for +12V and +5V power
supplies.
MODE OF
OPERATION
TYPICAL AVERAGE CURRENT
1, 4
(AMP RMS UNLESS OTHERWISE NOTED)
TYPICAL AVG.
POWER
5
(WATTS)
+12V
+5V
73.5 GB
147.1
GB
300 GB 73.5 GB
147.1
GB
300 GB 73.5 GB
147.1
GB
300 GB
Startup
peak1 1.34 1.33 1.57 0.84 0.68 0.69 19.7 19.4 22.41
Idle2 0.33 0.38 0.56 0.81 0.77 0.80 8.01 8.52 10.77
Max Work 0.75 0.78 0.96 0.84 0.80 0.83 13.16 13.32 15.70