I don't recommend you use VDI images in this way; we do not intend to support performant RW access; support for VDI images is there to convert to qcow2 or raw, generally.
That said, some questions that might be interesting to know the answer to: - Try converting your VDI image to raw or qcow2 and mounting that instead. Does the conversion work successfully? Can you export that image via qemu-nbd and mount it? Does it work? - Do non-BTRFS filesystems cause any problems? -- 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
