cannot use btrfs subvolumes with alternate installer

[Tom H]

On Thu, Jun 23, 2011 at 11:47 AM, Amedee Van Gasse
<amedee-ubuntu at amedee.be> wrote:
> On Thu, June 23, 2011 14:00, Tom H wrote:
>
>>> In fact it appears as if the install totally ignores my subvolumes and
>>> creates 2 new subvolumes for / and /home. This may very well be desired
>>> behavior for new installations, but I would prefer if I could tell the
>>> installer which subvolumes it should use.
>>
>> Did you originally set up the subvolumes directly through the
>> installer? I've tried, unsuccessfully, to replicate your
>> "/dev/sda2/root" and "/dev/sda2/home".
>
> Meh. I forgot about it when I came home yesterday.
>
> I originally set up the subvolumes through a Debian Live usb.
>
> It's not litterally /dev/sda2/root. It was something like
>
> # create partition and subvolumes
> mkfs.btrfs /dev/sda2
> mkdir -p /mnt/btrfs
> mount /dev/sda2 /mnt/btrfs
> btrfs subvolume create /mnt/root
> btrfs subvolume create /mnt/home
>
> # copy old /home to btrfs home subvolume
> mkdir -p /mnt/ext4
> mount /dev/sdb1 /mnt/ext4
> rsync -av /mnt/ext4/home/ /mnt/home
> umount /dev/sdb1

Thanks. I did the same thing and neither the Natty nor the Oneiric
installers recognized the subvolumes...