MacOS – How to set up ZEVO / ZFS on an internal disk while maintaining full disk encryption

It is faster in practice when writing changes to the disk - the new block encryption is hard to measure (meaning it's a negligible slowdown).

The new implementation removes nearly all of the compacting, and delay in creating and tearing down an encrypted space. It generally allows you to continue working while the bit grinding happens in the background.

The effort to shift a whole drive to encrypted blocks happens in the background while you can still use the mac but it's no different than waiting to turn on or off the old encryption.

In practice the new is far better performing across the board and has less times when you have to wait for it to do some long operation.

In the Time Machine pane of System Preferences, add any ZFS dataset.

For the first backup to that dataset, the operating system will:

1. create a sparse bundle disk image (….sparsebundle) at the root of that dataset
2. attach the image, after which you'll see a volume named Time Machine Backups.

For each subsequent backup to that dataset, the OS will:

1. attach the image, after which you'll see the Time Machine Backups volume.

Time Machine routines with ZFS are similar or identical to the routines that apply when backing up to a device – such as an Apple Time Capsule – that uses AFP.

How can one recover from TM after new/reinstallation? New OS installation knows nothing about ZFS to TM image is unreachable.