If you have a raid setup you may encounter this error during the server installation:
Unable to install GRUB in /dev/mapper
Executing ‘grub-install ‘/dev/mapper’ failed.
This is a fatal error
To fix this simply do the following:
Press CTRL + ALT + F2 to open a terminal
type: ls -l /dev/mapper
in the list you will find the name of your RAID, something like:
/dev/mapper/sil_biagdfaeefg_ghj
write down the exact name that appears after /mapper/
eg. sil_biagdfaeefg_ghjPress CTRL + ALT + F2 to return to the installation, and add the name of your RAID to /dev/mapper/
Now continue the installation.
