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Partition vs Volume
Posted by: Rolando
Date: January 01, 2023 11:56AM
I like to partition my Macs so one volume is on the Original OS, and the 2nd volume is the updated OS.

My MacBook came with macOS12.
Should I partition or make a new volume, so I can have two boot OS avaiable.

Carbon Copy Cloner is telling me to make a partition .





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Re: Partition vs Volume
Posted by: Tiangou
Date: January 01, 2023 12:10PM
1. Don't do it. Best to use an external drive for your second boot vol vs partitioning the internal drive on a new Mac.

2. Yes, you'd need to make a new partition for this purpose.

Don't.

Apple has gotten really sloppy about documenting the boot vols and processes on modern Macs and it's very easy for something to get hosed, if not immediately then on a future OS update/upgrade.

You'll note that CCC defaults to only copying the data vol from a drive now. It's because copying the whole architecture including the locked system-volume is messed up. Bombich took months to work out a way to do it that Apple didn't break and still calls it a "best effort" job. It uses Apple's clunky APFS replicator which is (at best) a work-in-progress.



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Re: Partition vs Volume
Posted by: gadje
Date: January 01, 2023 12:20PM
So the file system or at least the drive management took many steps backwards in recent years?
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Re: Partition vs Volume
Posted by: Tiangou
Date: January 01, 2023 01:04PM
Quote
gadje
So the file system or at least the drive management took many steps backwards in recent years?

Call it "sideways." There are new tricks for APFS volumes and multiple user-spaces and virtualization. Apple giveth and Apple lets rot for a few years and then taketh away.



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Re: Partition vs Volume
Posted by: PeterW
Date: January 01, 2023 01:11PM
When you back up a drive in a recent version of OS and it takes 15 seconds rather than 15 minutes like with previous versions, you’ll appreciate some of Apple’s tricks.
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Re: Partition vs Volume
Posted by: Tiangou
Date: January 01, 2023 01:46PM
Quote
PeterW
When you back up a drive in a recent version of OS and it takes 15 seconds rather than 15 minutes like with previous versions, you’ll appreciate some of Apple’s tricks.

Are you thinking of Carbon Copy Cloner? Wouldn't credit Apple with the speed benefits of CCC v6.



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