With the latest codebase there is no error message but the converted streamOptimized image is incorrect. I have a patch for this and will submit it for review soon.
** Changed in: qemu Status: New => Confirmed ** Changed in: qemu Assignee: (unassigned) => Radoslav Gerganov (rgerganov) -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1006655 Title: Can't convert to vmdk with the streamOptimized subformat Status in QEMU: Confirmed Status in qemu package in Ubuntu: Confirmed Status in qemu-kvm package in Ubuntu: Confirmed Bug description: Hi all, I'm trying to convert a qcow2 image file to the vmdk (on Ubuntu Server 12.04): # qemu-img convert -f qcow2 -O vmdk -o Stream spv-2912.qcow2 spv-2912-3.vmdk -o subformat=streamOptimized VMDK: can't write to allocated cluster for streamOptimized qemu-img: error while writing sector 65: Input/output error Same result with any input format. Others subformats work but the StreamOptimized is by far the most important one. The only workaround I found is to migrate to raw and then to use VBoxManage (VirtualBox). To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1006655/+subscriptions