Once the. As mentioned above, Time Machine keeps track of which files have been updated and need to be backed up. This file system changelog can become corrupt for various reasons, the most likely being unexpected shutdowns or freezes, as well as removing or turning off external volumes without ejecting them properly first. When Time Machine determines that the file system changelog isn't usable, it performs a deep scan of the file system to build a new changelog.
The deep scan process greatly extends the time it takes to prepare Time Machine to perform a backup. Luckily, once the deep scan is complete and the changelog is corrected, Time Machine should perform subsequent backups in a normal fashion.
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Measure content performance. Develop and improve products. List of Partners vendors. Tom Nelson. Facebook Twitter. Updated on December 28, Jessica Kormos. Lifewire Technology Review Board Member.
Jessica Kormos is a writer and editor with 15 years' experience writing articles, copy, and UX content for Tecca. Article reviewed on Apr 24, Tweet Share Email. Chris M says:. January 4, at pm. December 20, at am. Neal Jeff says:. December 10, at pm. Stuart says:. November 27, at pm. Nick Forester says:. November 5, at pm. Marcus Arroyo says:. Riley says:. September 28, at pm. Jay says:. August 24, at pm. Ken Smith says:. July 3, at pm. David says:. March 31, at am.
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My ipod touch 4th gen IOS 6. Just wait. It took 10 minutes for my Ipod to prepare the filesystem, be patient. Asked by: Muneerpp Kerala, India. Search for:. Asked by: Carol from New York, New York Carol, please try to reboot your jailbroken iPhone 4 for several times and then launch Cydia to see if you have fixed the issue.
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