On 27.04.2015 o 14:15, Hugo Mills wrote:
HOWEVER, you shouldn't take LVM snapshots of a btrfs filesystem AT ALL
I'd like to add, that generally when working with LVM and BTRFS, it's probably a good idea to always use "device=" mount option to make it scan only specified devices instead of all. I'd learned that the hard way, when I enabled SSD caching, and got massive corruption, because BTRFS mixed up cached devices with cache-origin devices. Now I have "device=/dev/mapper/vg-home1,device=/dev/mapper/vg-home2" in mount options in my fstab, and I can use LVM cache without worrying that things will get mixed up again.
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