list_domains
You get a list of all running VMs.
State:
xe vm-list name-label=<vm name>
xe vm-disk-list uuid=<uuid of vm> vbd-params= vdi-params=
xe vbd-list vm-name-label="TESTVM_NAME"
xe vdi-list uuid=$(xe vbd-list vm-name-label="TESTVM_NAME" params=vdi-uuid --minimal) params