On Sat, Nov 07, 2015 at 08:04:01PM +0100, Jakob Schürz wrote: > Hi there! > > I can't find any Information for my Problem. And I try to explain, what > I want. [snip] > BUT > > When i boot from f.e. @debian-snap2, the mechanics doesn't work any longer. > > btrfs subvol snapshot @debian-snap2 @debian-snap3 > > this works. > > btrfs send -p @debian-snap2 debian-snap3 | btrfs receive /backupmountpoint > > gives me an error, that btrfs can't find a subvol with a proper ID. > > Ho to do this, if i want to boot from a former snapshot (in case of a > mistaken system-upgrade) and i want to transfer the later snapshots to > the external HD - only the differences?
Basically, you can't right now. It's a known limitation, and can, I think, be fixed, but it'll need a change to the send stream format, which is a tricky migration to do (because there's currently no format identifier in it, which makes it hard to handle both formats easily). > There is nothing on the internet on this problem (I've found). But i > think this is a usecase, which I'm not alone needing it... You're not alone. It will come eventually, but only when David's in a position to deal with the issues of changing the send stream. Hugo. -- Hugo Mills | "No! My collection of rare, incurable diseases! hugo@... carfax.org.uk | Violated!" http://carfax.org.uk/ | PGP: E2AB1DE4 | Stimpson J. Cat, The Ren & Stimpy Show
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