Seg, 2013-07-01 às 17:50 +0200, Stefan Behrens escreveu: What you are trying to do is not possible, it is not supported. > > Btrfs send/receive can be used to create backups. The use case to > restore from backups is not addressed. > Ok, I see, but then I think I don't understand how btrfs send receive is working. Is it the case that the parent 'a' in 'btrfs send -p a b' has to be an "older" version of 'b' and never the other way around, perhaps in the sense of a having a lower transid as returned by sudo btrfs subvolume find-new a 999999999999999 ?
I tried doing 'btrfs send -p original a' then 'btrfs send -p a b', then deleting 'a' in the second disk and then doing 'btrfs send -p b a' but that also fails [1], the error happening on the receive side. best, -- Miguel Negrão http://www.friendlyvirus.org/miguelnegrao [1] 1999 touch /tmp/aaa.txt 2003 sudo btrfs subvolume snapshot -r /mnt/@ @-1 2004 touch /tmp/bbb.txt 2005 sudo btrfs subvolume snapshot -r /mnt/@ @-2 2007 sudo btrfs send -p @-2013-07-02-08\:03 @-1 | pv | sudo btrfs receive /media/miguel/huge/backups/@ 2008 sudo btrfs send -p @-1 @-2 | pv | sudo btrfs receive /media/miguel/huge/backups/@ 2010 btrdelete /media/miguel/huge/backups/@/@-1 2011 sudo btrfs send -p @-2 @-1 | pv | sudo btrfs receive /media/miguel/huge/backups/@ error: At subvol @-1 3,91kB 0:00:00 [ 345kB/s] [<=> ] At snapshot @-1 ERROR: failed to clone extents to var/log/syslog Invalid argument -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
