What is the Mac OS Journalled file system? - ehMac.ca
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Old Sep 16th, 2005, 01:57 AM   #1
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What is the Mac OS Journalled file system?

I keep reading about the Mac OS Journalled file system in various posts?
What is it?
The only options I get in disk utilities on OS 10.2 are

Mac OS Standard
Mac OS Extended

I know what those are, but Mac OS Journalled?????????????
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Old Sep 16th, 2005, 03:46 AM   #2
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I'm the not the knowledgeable about this but I'll bite. Journalling isn't a different format for the MacOS. It's a sits on top of the MacOS extended format and records keeps track of what happens on you hard drive so if there's an interuption, like a power outtage, it knows were to pick up from were it left off. To make a long story short, it helps you bounce back from crashes and stuff. You enable or disable journaling depending what you feel like in the disk utility application. Hopefully somebody will reply to this post and explain the performance dis/advantages to it.
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Old Sep 16th, 2005, 11:09 AM   #3
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There's actually a good discussion of Journaled File Systems here:



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