Seagate ST15150N Product Manual - Page 34

local to the drive.

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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 AYHX AYHX AYHX AYHX AYHX HDA housing Component Polar Writer CSAW Pike Driver Reference 1 2 3 4 5 Figure 13 MTBF 800k hours case temperature (°C) 48 64 47 52 60 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. 2 1 5 3 4 Figure 7. AYHX temperature measurement locations

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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
MTBF
800k hours
Card
Component
Reference
case temperature (°C)
AYHX
Polar
1
48
AYHX
Writer
2
64
AYHX
CSAW
3
47
AYHX
Pike
4
52
AYHX
Driver
5
60
HDA housing
Figure 13
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.
5
4
3
1
2
Figure 7. AYHX temperature measurement locations