[ovirt-users] Manually moving disks from FC to iSCSI

Hello, I have a source oVirt environment with storage domain on FC I have a destination oVirt environment with storage domain on iSCSI The two environments can communicate only via the network of their respective hypervisors. The source environment, in particular, is almost isolated and I cannot attach an export domain to it or something similar. So I'm going to plan a direct move through dd of the disks of some VMs The workflow would be On destination create a new VM with same config and same number of disks of the same size of corresponding source ones. Also I think same allocation policy (thin provision vs preallocated) Using lvs -o+lv_tags I can detect the names of my origin and destination LVs, corresponding to the disks When a VM is powered down, the LV that maps the disk will be not open, so I have to force its activation (both on source and on destination) lvchange --config 'global {use_lvmetad=0}' -ay vgname/lvname copy source disk with dd through network (I use gzip to limit network usage basically...) on src_host: dd if=/dev/src_vg/src_lv bs=1024k | gzip | ssh dest_host "gunzip | dd bs=1024k of=/dev/dest_vg/dest_lv" deactivate LVs on source and dest lvchange --config 'global {use_lvmetad=0}' -an vgname/lvname Try to power on the VM on destination Some questions: - about overall workflow - about dd flags, in particular if source disks are thin vs preallocated Thanks, Gianluca