This is extremely confusing:
https://guix.gnu.org/manual/en/html_node/Btrfs-file-system.html
I made my best attempt at creating and mounting a subvolume at
/media/offsite-backup:
(file-systems
(cons* (file-system
(mount-point "/")
(device
(uuid "b2e0f449-0583-46fd-8c23-ad2e6cd661a1"
'btrfs))
(type "btrfs"))
(file-system
(mount-point "/media/offsite-backup")
(device
(uuid "b2e0f449-0583-46fd-8c23-ad2e6cd661a1"
'btrfs))
(type "btrfs")
(options "subvol=offsite-backup,compress=zlib:9"))
It gives this error:
building
/gnu/store/mrs1qbg619qk4n2lv8k377arclgzwqjq-install-bootloader.scm.drv...
guix system: bootloader successfully installed on '/dev/sda'
guix system: warning: exception caught while executing 'start' on
service 'file-system-/media/offsite-backup':
In procedure mount: mount "/dev/sda2" on "///media/offsite-backup": No
such file or directory
guix system: warning: some services could not be upgraded
But /media/offsite-backup exists.
