GPT_disk_cloning

When cloning GPT disk just partly
 dd if=/dev/sda of=/dev/sdb

and the target disk is smaller then there is no partition table at the end.
To repair such disk it is necessary to run
 gdisk /dev/sdb
 v x e w
Means in gdisk we run verify then switch to extended and repair table and finally write changes to the disk.
 x f w
Means expert mode , randomize disk and partition unique GUIDs , write to disk

sgdisk -R /dev/sdb /dev/sda
sgdisk -G /dev/sdb