I thought there were qemu-img for that. Since qemu-nbd allows mounting images a rw block devices, it's logical to think that you can use it for that purpose. Will try to reproduce again the issue in case it was a kernel problem instead of qemu-nbd.
-- 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
