Barracuda 18LP Family: ST39175LW/LC ST318275LW ... - Seagate
Barracuda 18LP Family: ST39175LW/LC ST318275LW ... - Seagate
Barracuda 18LP Family: ST39175LW/LC ST318275LW ... - Seagate
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26 <strong>Barracuda</strong> <strong>18LP</strong> Product Manual, Rev. E<br />
6.4.2 Relative humidity<br />
The values below assume that no condensation on the drive occurs.<br />
a. Operating<br />
5% to 95% non-condensing relative humidity with a maximum gradient of 10% per hour.<br />
b. Non-operating<br />
5% to 95% non-condensing relative humidity.<br />
6.4.3 Effective altitude (sea level)<br />
a. Operating<br />
–1,000 to +10,000 feet (–305 to +3,048 meters)<br />
b. Non-operating<br />
–1,000 to +40,000 feet (–305 to +12,210 meters)<br />
6.4.4 Shock and vibration<br />
Shock and vibration limits specified in this document are measured directly on the drive chassis. If the drive is<br />
installed in an enclosure to which the stated shock and/or vibration criteria is applied, resonances may occur<br />
internally to the enclosure resulting in drive movement in excess of the stated limits. If this situation is apparent,<br />
it may be necessary to modify the enclosure to minimize drive movement.<br />
The limits of shock and vibration defined within this document are specified with the drive mounted by any of<br />
the four methods shown in Figure 5, and in accordance with the restrictions of Section 8.4. Orientation of the<br />
side nearest the LED may be up or down.<br />
6.4.4.1 Shock<br />
a. Operating—normal<br />
The drive, as installed for normal operation, shall operate error free while subjected to intermittent shock not<br />
exceeding 5 Gs at a maximum duration of 11 msec (half sinewave). Shock may be applied in the X, Y, or Z<br />
axis.<br />
b. Operating—abnormal<br />
Equipment, as installed for normal operation, does not incur physical damage while subjected to intermittent<br />
shock not exceeding 10 Gs at a maximum duration of 11 msec (half sinewave). Shock occurring at<br />
abnormal levels may promote degraded operational performance during the abnormal shock period. Specified<br />
operational performance will continue when normal operating shock levels resume. Shock may be<br />
applied in the X, Y, or Z axis. Shock is not to be repeated more than two times per second.<br />
c. Non-operating<br />
The limits of non-operating shock shall apply to all conditions of handling and transportation. This includes<br />
both isolated drives and integrated drives.<br />
The drive subjected to nonrepetitive shock not exceeding 75 Gs at a maximum duration of 11 msec (half<br />
sinewave) shall not exhibit device damage or performance degradation. Shock may be applied in the X, Y,<br />
or Z axis.<br />
The drive subjected to nonrepetitive shock not exceeding 150 Gs at a maximum duration of 2 msec (half<br />
sinewave) does not exhibit device damage or performance degradation. Shock may be applied in the X, Y,<br />
or Z axis.