After replacing the disk with raid 1, I have this problem:
grub2-install --recheck /dev/nvme0n1
Installing for i386-pc platform.
grub2-install: warning: Couldn't find physical volume `(null)'. Some modules may
be missing from core image..
grub2-install: warning: Couldn't find physical volume `(null)'. Some modules may
be missing from core image..
Installation finished. No error reported.
# cat /proc/mdstat:
Personalities : [raid1]
md0 : active raid1 nvme0n1p1[2] nvme1n1p1[1]
33521664 blocks super 1.2 [2/2] [UU]
md2 : active raid1 nvme0n1p3[2] nvme1n1p3[1]
465895744 blocks super 1.2 [2/2] [UU]
bitmap: 4/4 pages [16KB], 65536KB chunk
md1 : active raid1 nvme0n1p2[2] nvme1n1p2[1]
523712 blocks super 1.2 [2/2] [UU]
OS Centos 7 with software Raid 1
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
nvme0n1 259:0 0 477G 0 disk
├─nvme0n1p1 259:5 0 32G 0 part
│ └─md0 9:0 0 32G 0 raid1 [SWAP]
├─nvme0n1p2 259:6 0 512M 0 part
│ └─md1 9:1 0 511.4M 0 raid1 /boot
└─nvme0n1p3 259:7 0 444.4G 0 part
└─md2 9:2 0 444.3G 0 raid1 /
nvme1n1 259:1 0 477G 0 disk
├─nvme1n1p1 259:2 0 32G 0 part
│ └─md0 9:0 0 32G 0 raid1 [SWAP]
├─nvme1n1p2 259:3 0 512M 0 part
│ └─md1 9:1 0 511.4M 0 raid1 /boot
└─nvme1n1p3 259:4 0 444.4G 0 part
└─md2 9:2 0 444.3G 0 raid1 /
Is it UEFI - I do not know, a dedicated server PX61 at Hetzner
