Re: howto create subvolume at top level?

[Neal Becker <ndbecker2@gmail.com>]

Duncan wrote:

> Neal Becker posted on Mon, 01 Jun 2015 13:25:52 -0400 as excerpted:
> 
>> [nbecker@nbecker2 ~]$ sudo btrfs subvolume create /home2
>> Create subvolume '//home2'
>> [nbecker@nbecker2 ~]$ sudo btrfs subvolume list /
>> ID 257 gen 66376 top level 5 path root
>> ID 316 gen 66376 top level 257 path home2
>> 
>> This created home2 under root.  How do I create home2 with top level as
>> top level 5, at the same level as root?
>> 
>> IOW:
>> 
>> ID 257 gen 66376 top level 5 path root
>> ID 316 gen 66376 top level 5 path home2
> 
> Briefly stated, you don't.  Just like / is the top of a Unix style
> directory tree, the root subvolume is the top of a btrfs subvolume tree.
> You can't go higher than that, and that's what the top level /is/.
> 
> But what are you actually trying to do?  You _can_ change the default
> subvolume pointer so a subvolume other than root/5 is mounted by default,
> and you can nest subvolumes, so for most purposes, you can /pretend/ that
> some arbitrarily named subvolume is your top subvolume.  Alternatively,
> you can of course mount subvolumes wherever you want in the directory
> tree.
> 
> Also see the subvolumes discussion and related FAQs on the wiki if you
> haven't.
> 
> https://btrfs.wiki.kernel.org/
> 

But I already have a server setup like this, which was created by anaconda:

sudo btrfs subvolume list /
ID 256 gen 1828545 top level 5 path home
ID 259 gen 1818478 top level 5 path root
ID 487 gen 1828544 top level 5 path root00

-- 
Those who fail to understand recursion are doomed to repeat it