[ovirt-users] Ovirt VM started with old snapshots but with current disk missing

Hi, all: I have an ovirt 4.3 environment of 3 nodes. While i am using the following command (qemuCmd = 'qemu-img convert -p -c -O qcow2 '+backy2Source+' '+RESTOREPATH+disk.id) to merge qemu diks to do backup using backy2, unfortnately a power cut happened. After the power is back, the current disk disappeared in web UI and the recent data is lost when i restarted the virtual machine. But I could see the disk (44dd7a6f...) still exist, but Ovirt can not recognize it. How could i restore the disk identified by 44dd7a6f... so that ovirt can recognize it again? Anyone can help? Thanks!