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After upgrading (via apt-get dist-upgrade) a Mint 14 Linux box to Mint 15, apt-btrfs-snapshot seems to have stopped working:

18:25:48 [root@galaxy ~]$ apt-btrfs-snapshot list
Sorry, your system lacks support for the snapshot feature

Interestingly, the btrfs command-line tool doesn't list the snapshots by default either: (it used to before the upgrade)

18:25:50 [root@galaxy ~]$ btrfs subvolume list /
ID 270 gen 26538 top level 256 path stuff

but with the -a flag, it shows all the apt-btrfs-snapshot snapshots as well:

18:26:29 [root@galaxy ~]$ btrfs subvolume list -a /
ID 256 gen 26613 top level 5 path <FS_TREE>/@
ID 259 gen 26375 top level 5 path <FS_TREE>/@home
ID 270 gen 26538 top level 256 path stuff
ID 271 gen 348 top level 5 path <FS_TREE>/@apt-snapshot-2013-04-17_21:44:30
ID 272 gen 352 top level 5 path <FS_TREE>/@apt-snapshot-2013-04-17_21:46:25
...
ID 458 gen 26322 top level 5 path <FS_TREE>/@apt-snapshot-2013-06-09_15:55:09

So I guess my two questions would be:

  • What's up with this <FS_TREE> stuff?
  • Why did apt-btrfs-snapshot stop working?

Relevant package versions:

ii  btrfs-tools        0.19+2013011
ii  apt-btrfs-snap     0.3.4.1     
ii  linux-image-3.8.0- 3.8.0-23.34
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  • But the apt-get dist-upgrade doesn't upgrade the whole distribution. It only pulls the new kernel, which must be supported by your current distribution (not the new one). This is by design in Ubuntu and in Mint 14 particularly. Commented Jun 9, 2013 at 16:04
  • Well I also changed the relevant files in /etc/apt/sources.list.d to point to the new Ubuntu and Mint releases Commented Jun 10, 2013 at 4:15
  • Last year btrfs suffered changes, IMO this should not be an issue anymore. Commented Aug 16, 2014 at 0:58
  • @Braiam I vaguely recall seeing somewhere that a certain version of btrfs (or the tools) broke apt-btrfs-snapshot... If you can track that down, that'd be a good answer for this question. Commented Aug 16, 2014 at 2:26
  • @derobert - looks like the asker handled it himself. Commented Aug 16, 2014 at 2:58

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