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<blockquote data-quote="Slydude" data-source="post: 1675043" data-attributes="member: 131855">A &quot;bootable backup&quot; copies your files to another drive in such a way that in an emergency you could start your Mac from the backup drive. Here's an example of what I mean:A few years ago I came home one day to discover that my Mac Pro tower had shut down and would not restart. Fortunately I had just made a bootable backup (a.k.a clone) a few days before). The computer booted from the external drive and ran well. This let me know that the computer itself was OK. A few days later I had time to test the internal drive and conclude that it was hosed. Since it was still under warranty Apple shipped me a replacement drive and I was able to copy things to the new internal drive and boot from there. By the time I received a replacement drive a week had gone by due to my needing to find time to test it. With the bootable backup the total time lost was about 10 minutes -- the time it took to locate the external drive and boot from it to return to work and test the drive later as needed.</blockquote>

[QUOTE="Slydude, post: 1675043, member: 131855"] A "bootable backup" copies your files to another drive in such a way that in an emergency you could start your Mac from the backup drive. Here's an example of what I mean: A few years ago I came home one day to discover that my Mac Pro tower had shut down and would not restart. Fortunately I had just made a bootable backup (a.k.a clone) a few days before). The computer booted from the external drive and ran well. This let me know that the computer itself was OK. A few days later I had time to test the internal drive and conclude that it was hosed. Since it was still under warranty Apple shipped me a replacement drive and I was able to copy things to the new internal drive and boot from there. By the time I received a replacement drive a week had gone by due to my needing to find time to test it. With the bootable backup the total time lost was about 10 minutes -- the time it took to locate the external drive and boot from it to return to work and test the drive later as needed. [/QUOTE]

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