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PULSAR.2 SAS PRODUCT MANUAL, REV. C 29
6.5.1 Temperature
a. Operating
The drive meets the operating specifications over a 41°F to 140°F (5°C to 60°C) drive case temperature range with a maximum
temperature gradient of 36°F (20°C) per hour.
The maximum allowable drive case temperature is 60°C.
The MTBF specification for the drive assumes the operating environment is designed to maintain nominal case temperature. The rated
MTBF is based upon a sustained case temperature of 122°F (50°C). Occasional excursions in operating temperature between the
rated MTBF temperature and the maximum drive operating case temperature may occur without impact to the rated MTBF
temperature. However continual or sustained operation at case temperatures beyond the rated MTBF temperature will degrade the
drive MTBF and reduce product reliability.
Air flow may be required to achieve consistent nominal case temperature values (see Section 6.5). To confirm that the required cooling
is provided, place the drive in its final mechanical configuration, and perform random write/read operations. After the temperatures
stabilize, measure the case temperature of the drive. See Figure 9 and 10 for temperature checkpoint.
b. Non-operating
–40° to 158°F (–40° to 70°C) package ambient with a maximum gradient of 36°F (20°C) per hour. This specification assumes that the
drive is packaged in the shipping container designed by Seagate for use with drive.
Figure 9. Temperature check point location - 15mm drives
Figure 10. Temperature check point location - 7mm drives
Note. Images may not represent actual product, for reference only.
6.5.2 Relative humidity
The values below assume that no condensation on the drive occurs.
a. Operating
5% to 95% non-condensing relative humidity with a maximum gradient of 20% per hour.
b. Non-operating
5% to 95% non-condensing relative humidity.
6.5.3 Effective altitude (sea level)
a. Operating
–200 to +10,000 feet (–60.96 to +3048 meters)
b. Non-operating
–200 to +40,000 feet (–60.96 to +12,192 meters)