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Encrypt Mail, Address Book, and iCal data
Authored by: glgray on Sep 22, '08 08:11:26AM

Thank you for the very interesting tip. One question though...

Don't Time Machine backups (or any other incremental backup method) become rather onerous if you do this? For example, my Mail folder is 3+GB -- won't that entire 3GB need to be backed up every time I send or received an email message?

I suppose I could exclude that disk image, but then I am defeating the purpose of automatic backups. Am I missing something here?



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Encrypt Mail, Address Book, and iCal data
Authored by: Toadling on Sep 22, '08 09:42:02AM

Not if you use the Sparse Bundle format, which stores the disk image as a collection of 8 MB "bands" inside a single bundle. That way Time Machine only has to copy the bands that have changed.

Of course, a change on a single byte will still force an 8 MB backup, but that's a lot better than your entire 3 GB disk image!

-Dennis



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Encrypt Mail, Address Book, and iCal data
Authored by: glgray on Sep 22, '08 12:55:34PM

Excellent! I did not know that sparse bundles were stored that way. We just did this on a friend's machine and it worked like a charm -- I will be doing it tonight.

Thank you!



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