Let's say we have a snapshot called "snapshot" on our device "/dev/sdb". Now we boot a qemu machine and attatch the disk read only (since we do not want to put our data at risk in the vm, and read only should be enough to get our snapshot data). I used qemu-system-x86_64 -drive -file=/dev/sdb,if=scsi,readonly -hda <path_to_guest_operating_system> When we are in the qemu instance (suppose our device /dev/sdb is mounted on /mnt/import), we want to import our data now using btrfs send/receive: btrfs send /mnt/import/snapshot | btrfs receive / we get the following problems in syslog due to the fact that our device is read only: delayed_refs has NO entry BTRFS warning (device sdb): btrfs_update_root:151: Aborting unsused transaction(No space left) BTRFS warning (device sdb): Skipping commit of aborted transaction. BTRFS warning (device sdb): cleanup_transaction:1547: Aborting unused transaction (No space left) Apart from the snapshot folder being created in / nothing happens, the process simply hangs forever, with no actual data getting imported. Is that supposed to be that way? Why is readonly not enough to import data using btrfs send? -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html