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APFS creates VM disk?
- Thread starter LK LAW
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APFS can share space between partitions. So there is no downside in making a stand alone VM partition.
No but what are these partitions used for? And how does it defer from what HFS used to be?
VM is for the swap. If your apps requires more RAM than the one you have it will use the space in the VM partition. HFS+ had one or more swap file instead.
Didn’t Ubuntu Just ditch the swap ditch the swap partition instead in favor of swap files?
Also got any idea what the preboot partition does?
Well, I don't think Ubuntu's system would work the way APFS does with volume space sharing. I think an Ubuntu swap partition would remove that space from availability irreversibly.
No idea what pre-boot is.
grahamperrin
macrumors 601
The same with APFS. Swap files.
I answered a similar question in Apple Developer Forums. In a Terminal window:
diskutil apfs updatePreboot
msephton
macrumors 6502a
That doesn't answer what the reboot partition does. Rather it shows one thing you can do to it.
As I understand it, the reboot partition does some pre-boot housekeeping and security tasks, then hands off to the main boot partition.
grahamperrin
macrumors 601
curnalpanic
macrumors 6502a
Yes, there are still swap files, but the mount command reveals that the VM partition is mounted at /private/var/vm.