Figure 7. Ayhx Temperature Measurement Locations - Seagate ST15150N - Barracuda 4.3 GB Hard Drive Product Manual

24 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D
To confirm that the required cooling for the Barracuda electronics and HDA
is provided, place the drive in its final mechanical configuration, perform
random write/read operations and, after the temperatures stabilize, measure
the case temperature of the components listed on the next several pages.
To obtain the maximum temperature for each of the reference components
listed, add 15°C to the MTBF case temperatures. Operation of the drive at
the maximum case temperature is intended for short time periods only.
Continuous operation at the elevated temperatures will reduce product
reliability.
Air-flow cooling
ST15150N drives
single-ended
Card Component
AYHX Polar
AYHX Writer
AYHX CSAW
AYHX Pike
AYHX Driver
HDA housing
The air-flow pattern with which the temperature guidelines above were
generated is shown in Figure 6. Local average air velocities were 0.61 msec
(120 lfpm) and inlet air temperature to the drive was 30°C (86°F), plus a 5°C
temperature rise in the test enclosure (35°C ambient local to the drive).
The maximum allowable HDA case temperature is 60°C.
1

Figure 7. AYHX temperature measurement locations

Reference
1
2
3
4
5
Figure 13
2
3 4
MTBF
800k hours
case temperature (°C)
48
64
47
52
60
5