With "one disk" I basically mean pools consisting of a single toplevel vdev. 
The current documentation poses this restriction, either a single disk or a 
mirror.

The thing I have in mind is the ability to create a single pool of all disks in 
a system as top level devices, basically a JBOD or even RAIDZ, while also being 
able to boot from it. The mentioned restriction, if it still applies, would 
require me to create two pools, one for the bootfs, the other for the data. 
This would imply that I'd have to divide one of the disks to be used into two 
slices, one used for the bootfs, the other for the data pool, to minimize the 
potentially unused diskspace wasted on the bootfs.

Slicing a disk isn't that tragic, but I guess to be avoided, as it is preferred 
to use whole disks. Thus why I'm trying to find out about this and was 
wondering what's planned in future for ZFS boot.

Regards.
-mg
 
 
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