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From: don fisher <hdf3@comcast.net>
To: "linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>
Subject: Re: nube trying to backup my systems
Date: Thu, 19 Mar 2015 18:49:32 -0700	[thread overview]
Message-ID: <550B7CAC.6030005@comcast.net> (raw)
In-Reply-To: <CAJCQCtRj6MWc=YzvEepjiZTQYrN7CKbO0EivotZNjS218Gz56Q@mail.gmail.com>

>
> # btrfs sub list /
> ID 257 gen 1703 top level 5 path root
> ID 258 gen 1662 top level 5 path home
> ID 259 gen 1681 top level 5 path boot
> ID 262 gen 1629 top level 257 path var/lib/machines
>
> To mount machines, either
> subvol=root/var/lib/machines
> OR
> subvolid=262
>
> Why root/var/lib/machines? Because var/lib/machines is created inside
> subvol 257, a.k.a. root, therefore the path relative to the top level
> 5 subvolume is root/var/lib/machines. It might be easier to figure
> this out for a while to use -a switch.
>
> # btrfs sub list -a /mnt/btraid0/
> ID 257 gen 1705 top level 5 path <FS_TREE>/root
> ID 258 gen 1662 top level 5 path <FS_TREE>/home
> ID 259 gen 1681 top level 5 path <FS_TREE>/boot
> ID 262 gen 1705 top level 257 path root/var/lib/machines

The use of the IDs worked. I did not know where they came from, or if 
they would be repeatable across boots. So I assumed ID => UUID. My 
bad:-( My rot is mounted at /usr11. I tried:

UUID=26d63d99-92f4-4a49-878b-236f5e88af69 /usr11/srv btrfs 	 
subvol=usr11/srv 	0 0

but /usr11/srv did not mount. I replaced the number and it did mount. 
Would like to use string like you suggested since they are more 
understandable. Do you see what I did wrong? Any thoughts on stability 
of the IDs across boots?

Thanks,
Don

  reply	other threads:[~2015-03-20  1:49 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-19 23:31 nube trying to backup my systems don fisher
2015-03-20  0:16 ` Chris Murphy
2015-03-20  1:49   ` don fisher [this message]
2015-03-20  2:15     ` Chris Murphy
2015-03-20  2:34       ` don fisher
2015-03-20  3:04         ` Chris Murphy
2015-03-20  4:34     ` Duncan

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