Seagate SkyHawk Serial ATA Product Manual, Rev. B
14
www.seagate.com
Drive specifications
PowerChoice Supported Extended Power Condition Identifiers
1.2.6
Environmental limits
Temperature and humidity values experienced by the drive must be such that condensation does not occur on any
drive part. Altitude and atmospheric pressure specifications are referenced to a standard day at 58.7°F (14.8°C).
NOTE
To maintain optimal performance drives should be run at nominal drive
temperatures and humidity.
See
Section 1.2.10, "Reliability"
for rated MTBF device operating condition
requirements.
1.2.6.0.1
Temperature
a. Operating
41°F to 158°F (5°C to 70°C) temperature range with a maximum temperature gradient of 36°F (20°C) per hour as reported by the
drive.
The maximum allowable drive reported temperature is 158°F (70°C).
Air flow may be required to achieve consistent nominal drive temperature values (see
Section 1.3.4
). To confirm that the
required cooling is provided for the electronics and HDA, place the drive in its final mechanical configuration, and perform
random write/read operations. After the temperatures stabilize, monitor the current drive temperature using the SMART
temperature attribute 194 or Device Statistics log 04h page 5.
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.
1.2.6.1
Humidity
The values below assume that no condensation on the drive occurs. Maximum wet bulb temperature is 84.2°F (29°C).
1.2.6.1.1
Relative humidity
1.2.6.1.2
Effective Altitude (sea level)
Power Condition Identifiers
Power Condition Name
00
H
Standby_z
01 - 80
H
Reserved
81
H
Idle_a
82
H
Idle_b
83
H
Idle_c
84 - FE
H
Reserved
FF
H
All EPC Power Conditions
Operating:
5% to 95% non-condensing relative humidity with a maximum gradient of 20% per hour.
Nonoperating:
5% to 95% non-condensing relative humidity with a maximum gradient of 20% per hour.
Operating:
–304.8 m to 3048 m (–1000 ft. to 10,000+ ft.)
Nonoperating:
–304.8 m to 12,192 m (–1000 ft. to 40,000+ ft.)
