Created attachment 846693 [details]
output of `grub2-install -vvvv  /dev/nvme0n1`

This is what I see

tux:~ # grep -A1 warning: log
grub2-install: warning: not a newc filesystem.
grub-core/kern/fs.c:57: Detecting hostfs...
--
grub2-install: warning: Embedding is not possible.  GRUB can only be installed
in this setup by using blocklists.  However, blocklists are UNRELIABLE and
their use is discouraged..
grub2-install: error: will not proceed with blocklists.

with the layout

tux:~ # parted -l             
Model: ATA ST2000LM003 HN-M (scsi)
Disk /dev/sda: 2000GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos
Disk Flags: 

Number  Start   End     Size    Type      File system  Flags
 1      1049kB  2000GB  2000GB  extended               lba, type=0f
 5      2097kB  1100GB  1100GB  logical   xfs          type=83
 6      1100GB  1207GB  107GB   logical   xfs          type=83
 7      1207GB  1422GB  215GB   logical   xfs          type=83
 8      1422GB  2000GB  579GB   logical   xfs          type=83


Model: NVMe Device (nvme)
Disk /dev/nvme0n1: 128GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 

Number  Start   End     Size    File system     Name  Flags
 1      1049kB  8591MB  8590MB  linux-swap(v1)  swap  swap
 2      8591MB  19.3GB  10.7GB  ext3            boot  legacy_boot
 3      19.3GB  128GB   109GB   xfs             root