Drive Power Dissipation; Table 4-5 Power Dissipation In Various Modes (Low-Profile Drives) - Maxtor ATLAS 10K IV User Manual

Specifications
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 IV hard disk drive.
Table 4-5
MODE OF
OPERATION
Startup
1
peak
2
Idle
Max Workload
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.The actuator resides
on the last track accessed.
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. Maximum Average Current is defined as mean current plus 3 Standard
Deviations.
5. Power requirements reflect nominal values for +12V and +5V power supplies.
4-6 Maxtor Atlas 10K IV
Power Dissipation in Various Modes (Low-Profile Drives)
TYPICAL AVERAGE CURRENT
(AMP RMS UNLESS OTHERWISE NOTED)
+12V
147.1
36.8 GB 73.6 GB 36.8 GB
GB
2.2A 2.2A 2.2A
.363A .459A .608A
.739A .848A 1.04A
1, 4
TYPICAL AVG. POWER
+5V
147.1
73.6 GB 36.8 GB
GB
0.9A 0.9A 0.9A
.609A .607A .588A <7.8W
.623A .621A .604A <11.9 W
5
(WATTS)
147.1
73.6 GB
GB
<8.9W <10.3W
<13.3W <15.6W