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Product Manual - Hawk 4 Family (Wide) SCSI-2 (Volume 1), Rev. E
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7.4.1
Temperature
a. Operating
The drive meets all specifications over a 41°F to 131°F (5°C to 55°C) drive ambient temperature range
with a maximum gradient of 36°F (20°C) per hour. The enclosure for the drive should be designed such
that the temperatures at the locations specified in Table 7.4.1-1, column 1 are not exceeded. Air flow may
be needed to achieve these temperature values. Operation at case temperatures above these values
may adversely affect the drives ability to meet specifications.
The MTBF specification for the drive is based on operating at an ambient temperature of 95°F (35°C).
Occasional excursions to drive ambient temperatures of 55°C or 5°C may occur without impact to speci-
fied MTBF. To achieve the specified MTBF, the values of Table 7.4.1-1 Column 2 must be considered
maximum average operating case temperatures. Air flow may be needed to achieve these temperatures.
Continual or sustained operation at case temperatures above these values may degrade MTBF.
Items
in
Figure
7.4.1-1
U2
U31
U17
U5
U3
HDA
Notes:
[1] The temperatures shown in Column 2 were measured on an unmounted drive lying on its side during
random write/reads at 100% duty cycle in still air.
[2] The temperatures in Column 1 are calculated and may not reflect actual operating values. Sufficient
cooling air may be required to ensure that these values are not exceeded.
b. Non-Operating
-40° to 158°F (-40° to 70°C) package ambient with a maximum gradient of 45°F (25°C) per hour. This
specification assumes that the drive is packaged in the shipping container designed by Seagate for use
with the drive.
Table 7.4.1-1. PCB and HDA temperatures
Column 1
Maximum Case
Temperatures (°C)
Operating 55°C Ambient [2]
88
100
101
98
91
65
21
Column 2
Typical Case
Temperatures (°C)
at 35°C Ambient [1]
70
61
60
61
56
45
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