Setup-Storage: how to specify multiple btrfs subvolumes?

[Urs Ganse]

However, with the following configuration:

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
disk_config disk1 disklabel:msdos bootable:1 fstabkey:uuid

primary -       10G-30G -       -
primary /some/other/partition 100-50%:preserve_always ext4 
rw,noatime,nosuid,nodev

disk_config btrfs
btrfs raid1             /       disk1.1 subvol=@root
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

the installation aborts with the error:

Cannot satisfy pre-depends for mkfs.btrfs -d raid1  /dev/sda1: 
pt_complete_/dev/vdd -- system left untouched.
Error in task partition. Code: 710

//Urs