But for me there is no element for the value of space. It looks something like this: <disk_attachment href="/ovirt-engine/api/vms/678faf6f-fa5f-4785-a365-e1b85925575f/diskattachments/f770c0d1-dd0d-40a8-a69a-a63d8db5c2cc" id="f770c0d1-dd0d-40a8-a69a-a63d8db5c2cc"> <active>true</active> <bootable>true</bootable> <interface>virtio_scsi</interface> <pass_discard>false</pass_discard> <read_only>false</read_only> <uses_scsi_reservation>false</uses_scsi_reservation> <disk href="/ovirt-engine/api/disks/f770c0d1-dd0d-40a8-a69a-a63d8db5c2cc" id="f770c0d1-dd0d-40a8-a69a-a63d8db5c2cc"/> <vm href="/ovirt-engine/api/vms/678faf6f-fa5f-4785-a365-e1b85925575f" id="678faf6f-fa5f-4785-a365-e1b85925575f"/> </disk_attachment> So is it not possible to increase extend space using the API in ovirt?