Issue

• I am trying to clone a disk with an EFI System Partition and the operating system, using Linux software RAID.

• With this existing system disk:

# parted /dev/mapper/mpatha unit s print
Model: Linux device-mapper (multipath) (dm)
Disk /dev/mapper/mpathb: 419430400s
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number  Start     End         Size        File system  Name  Flags
 1      2048s     411647s     409600s     fat16              boot
 2      411648s   1435647s    1024000s    ext4
 3      1435648s  419428351s  417992704s                     lvm

• Create the same partition layout on the disk to be mirrored:

# parted /dev/mapper/mpathb  mkpart primary  2048s 411647s 
# parted /dev/mapper/mpathb  mkpart primary 411648s 1435647s
# parted /dev/mapper/mpathb  mkpart primary 1435648s 419428351s

• And add the RAID flag on all partitions that will be mirrored.

parted /dev/mapper/mpatha set 1 raid on
parted /dev/mapper/mpatha set 2 raid on
parted /dev/mapper/mpatha set 3 raid on

parted /dev/mapper/mpathb set 1 raid on
parted /dev/mapper/mpathb set 2 raid on
parted /dev/mapper/mpathb set 3 raid on

• After this step, the system will not boot.