Copying the disk data
Copy the disk data of the original system to the disk of the copy destination system.
Copy the data by using software such as SystemcastWizard, which provides the cloning function, or by using the function to copy the disk data such as the copy function of storage.
For details, see the manuals of these functions.
Setting up the system disk mirroring
If the system disk mirroring is canceled in "6.12.3 Preparation", mirror the system disk again on the original system.
For how to set up, see "6.5 System Disk Mirroring Settings [EFI]."