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Apple Computing Products:
macOS - Desktop Hardware
Hard disk hum driving me mad
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<blockquote data-quote="gilesjuk" data-source="post: 399949" data-attributes="member: 29394"><p>This is an Intel Mac Pro, they are different to the G5.</p><p></p><p>There are 4 hard disk sleds. They are all metal and have metal screws.</p><p></p><p>The drives hang upside down (probably part of the problem, some drives aren't designed for that) and are screwed to the sleds which slide into the case and the SATA connectors of the drives slide into sockets on the boards (there are no cables).</p><p></p><p>The problem is some drives do create vibration and the thickness of the case, the rigidity means the vibrations are not dissipated. A PC case typically has thin sheet metal to hold the drives and these are suspended in the middle of the case with no connection to the outer case.</p><p></p><p>In the Mac pro the locking mechanism for the drives means vibrations from the drive bay can pass to the outer case as they become directly connected.</p><p></p><p>The Mac Pro is too rigid, you need hard disks with very well balanced motors so there is very little vibration.</p></blockquote><p></p>
[QUOTE="gilesjuk, post: 399949, member: 29394"] This is an Intel Mac Pro, they are different to the G5. There are 4 hard disk sleds. They are all metal and have metal screws. The drives hang upside down (probably part of the problem, some drives aren't designed for that) and are screwed to the sleds which slide into the case and the SATA connectors of the drives slide into sockets on the boards (there are no cables). The problem is some drives do create vibration and the thickness of the case, the rigidity means the vibrations are not dissipated. A PC case typically has thin sheet metal to hold the drives and these are suspended in the middle of the case with no connection to the outer case. In the Mac pro the locking mechanism for the drives means vibrations from the drive bay can pass to the outer case as they become directly connected. The Mac Pro is too rigid, you need hard disks with very well balanced motors so there is very little vibration. [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
Hard disk hum driving me mad
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