I agree, the program doesn't stop you from doing such things. It should work without error, but it might be slow. Just offering some advice you may not want to use it like this.
Try to reproduce with qcow2 and qemu-nbd to see if the problem is with our support of the disk image format or if it's a problem with e.g. the access patterns and qemu-nbd itself, for instance. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1877418 Title: qemu-nbd freezes access to VDI file Status in QEMU: New Status in btrfs-progs package in Ubuntu: New Bug description: Mounted Oracle Virtualbox .vdi drive (dynamically allocated), which has GTP+BTRFS: sudo modprobe nbd max_part=16 sudo qemu-nbd -c /dev/nbd0 /storage/btrfs.vdi mount /dev/nbd0p1 /mydata/ Then I am operating on the btrfs filesystem and suddenly it freezes. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1877418/+subscriptions