On Sat, 19 Mar 2022 at 16:14, Samuel Sieb <samuel@sieb.net> wrote:
On 3/19/22 05:18, George N. White III wrote:
> Or just letting btrfs create over-sized "virtual partitions" and then
> allocating
> physical space as needed.

btrfs doesn't do that.  That's LVM thin-provisioning.

Fresh install of Fedora 35 using default installation in the free space
(after shrinking the OEM Windows partition, leaving a little over 400 GB):

 % df -lhT | grep btrfs
/dev/nvme0n1p6 btrfs     405G   89G  316G  22% /
/dev/nvme0n1p6 btrfs     405G   89G  316G  22% /home
 % sudo pvs -a
  PV             VG Fmt Attr PSize PFree
  /dev/nvme0n1p1        ---     0     0
  /dev/nvme0n1p2        ---     0     0
  /dev/nvme0n1p3        ---     0     0
  /dev/nvme0n1p4        ---     0     0
  /dev/nvme0n1p5        ---     0     0
  /dev/nvme0n1p6        ---     0     0
  /dev/sda1             ---     0     0
  /dev/sda2             ---     0     0
  /dev/sdb1             ---     0     0
  /dev/sdb2             ---     0     0

So the 405G btrfs shows / and /home sharing the 405G, and no PV's for lvm to use.






 
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--
George N. White III