Re: Sharing free space?

On Nov 29, 2019, at 4:18 PM, Michael <[email protected]> wrote:
> 
>> If you have room on your main disk and it is APFS-formatted, you can easily create a new volume in Disk Utility that will share the free space, and if it doesn't work out, you can delete the volume later.
> 
> I'd like to know how to get two volumes to share free space if they are on the same physical disk.
> 
> Heck, even with 10.9-10.12's logical volume groups, the same question.
> 
> If this is something new in the "We'll force your root disk to be repartitioned because we're now making root read only" system, then it's a "don't care, thanks anyways" issue.

It’s related to the latter point, but it’s not limited to only the boot volume being read-only. The boot volume being read-only is a Catalina change, but free space sharing was introduced with APFS in High Sierra.

To simplify, APFS uses containers, and multiple volumes within a single container will share the same free space. There’s been a bunch written about this, but a decent overview can be found here:

https://blog.macsales.com/44596-partition-drives-create-apfs-containers-for-space-sharing-with-disk-utility/ <https://blog.macsales.com/44596-partition-drives-create-apfs-containers-for-space-sharing-with-disk-utility/>

	Matt

_______________________________________________
MacOSX-talk mailing list
[email protected]
https://www.omnigroup.com/mailman/listinfo/macosx-talk