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Time Machine: Mount backup disk on demand
Authored by: syzygies on Aug 02, '10 11:09:01PM

Mounted drives are unsafe for exactly the reasons that Apple wants you to unmount a drive before physically unplugging it. Maximizing the fraction of the time that one can safely yank a drive off the computer without warning just isn't part of Apple's spec. However, try teaching this to the California power companies! I do have a UPS protecting my equipment, but a cautious backup strategy demands that I plan on its eventual failure.

Developing a backup strategy requires one to be constructively paranoid. If I get hosed by a failure mode I wasn't expecting, I still have only myself to blame.

Yes, /Library/LaunchDaemons/ is the official place for user-provided launchd jobs (cron is dead), and one shouldn't modify /System. In practice, the overhead of setting up a launchd job is much greater than that of dropping an arbitrary script into /etc/periodic/daily. No plist required; can you write a launchd plist from memory?

I monitor the logs from my daily and hourly tasks, as part of the routine of rotating media. Were an update to clobber these tasks, I'd notice right away.

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