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#1
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You can't make a Data-only backup on Catalina. Only Big Sur and later.
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--Dave Nanian |
#2
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I tried using a script that excludes System, but from what I can tell, it has copied the entire system volume without loading or respecting any of the script commands.
That is, it didn't load the script commands until it got to the Data volume, and by that time it is too late. |
#3
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Yes, under Catalina it always copies the system volume. The script does not apply to the system volume copy.
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--Dave Nanian |
#4
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So it would copy the system volume even if using the "Backup - user files" script? And basically under Catalina there's no way to avoid creating a bootable backup?
Note: I tried something else: I mounted just the data volume of my SSD backup only, thinking then it could just copy it without considering it to be part of a macOS volume. But while it definitely is mounted (I can open it from the Terminal), the Copy source picker won't show it as an option. |
#5
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Yup. Since the behavior had already been defined with regard to Smart Update (which can update the OS under Catalina) it always copies the OS. The data volume on its own (if given the Data role) won't show up.
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--Dave Nanian |
#6
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I succeeded in backing up Catalina to the 1.5 TB drive, with ~400 GB to spare, and it is fully encrypted.
As others have noted, it is no fun booting from a HDD. Especially annoying is that you can't open the Security & Privacy preference pane to turn encryption on; it times out and gives an error. I think the problem is that XProtect is busy scanning the entire drive, which takes hours on an HDD (and that's even though presumably after the initial SuperDuper clone, the HDD is perfectly defragged!). I finally got the Security & Privacy pane to load by using the renice command to bump up its priority:
Last edited by mschmitt; 08-22-2022 at 11:26 PM. |
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