ddve 4.0 and NVRAM disk

Hello! I have a KVM hypervisor. I installed ddve 4.0 and connected 250 and 10 GB drives. But I can't see NVRAM. Should I see dev1 and dev2?
But this is not!

sysadmin@ddve-vc1# disk show hardware
Disk Slot Manufacturer/Model Firmware Serial No. Capacity Type
(pci/idx)
---- --------- ------------------------ -------- -------------------------------- --------- ----
dev1 0:0 QEMU QEMU_HARDDISK n/a e26de30a-8648-42c0-b6dd-19239a2f 250.0 GiB SAS
dev6 0:2 QEMU QEMU_HARDDISK n/a (unknown) 10.0 GiB SAS
---- --------- ------------------------ -------- -------------------------------- --------- ----
2 drives present.

# disk show state
Dev 1 2 3 4 5 6
--- ------------------
1-6 U - - - - U
--- ------------------

Legend State Count
------ ------------------- -----
- Not Installed Disks 4
U Unknown Device 2
------ ------------------- -----
Total 0 disks and 6 devs

How do I connect NVRAM?