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Apple Computing Products:
macOS - Operating System
Time Machine back up all hard drives?
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<blockquote data-quote="Big Dan" data-source="post: 862968" data-attributes="member: 85017"><p>Yes they reference the same material, I've guessing via hard links. The way Time Machine works is seems very similar to the way an age old Linux tool called '<a href="http://en.wikipedia.org/wiki/Rsync" target="_blank">rsync</a>' works. </p><p></p><p>The system is pretty simple and ingenious at the time same. If a file still exists but hasn't changed since the last back it hard links the file to it's original backup instead of making a duplicate copy and wasting space. </p><p></p><p>The Wikipedia entry explains it well, probably better than me. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> <a href="http://en.wikipedia.org/wiki/Time_Machine_%28Apple_software%29" target="_blank">Time Machine (Apple software) - Wikipedia, the free encyclopedia</a> check out the how it works section.</p></blockquote><p></p>
[QUOTE="Big Dan, post: 862968, member: 85017"] Yes they reference the same material, I've guessing via hard links. The way Time Machine works is seems very similar to the way an age old Linux tool called '[URL="http://en.wikipedia.org/wiki/Rsync"]rsync[/URL]' works. The system is pretty simple and ingenious at the time same. If a file still exists but hasn't changed since the last back it hard links the file to it's original backup instead of making a duplicate copy and wasting space. The Wikipedia entry explains it well, probably better than me. :) [URL="http://en.wikipedia.org/wiki/Time_Machine_%28Apple_software%29"]Time Machine (Apple software) - Wikipedia, the free encyclopedia[/URL] check out the how it works section. [/QUOTE]
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Apple Computing Products:
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Time Machine back up all hard drives?
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