Reading the Guide seemed to have to install Grub not in /dev/sdc (linux HDD in my system) but in /dev/sdc1 ("/" root partition of linux installation): have I misunderstood something?
I installed Linux last. Do You mean to re-install grub in /dev/sda or dev/sda1: it's differentFor me is Ok : grub must bet set here to load linux at booting :
Sometimes the problem is during install with live CD to install grub in another partition and after if you install W10 &/ OS X this will erase grub, there is a way to re-install grub in /dev/sda linux with the "grub rescue CD"
This Guide says:Yes with no grub in / dev/ sda no may no booting linux.
My experience from 2006/2007 in began to use linux is that you have to be very careful during install : linux like a capricious child ;-) some experience of using terminal command is often requiried;
This Guide says:
"The only things to keep in mind are that you need to install Grub to the root of your Linux install and that for some reason Clover will not see the Ubuntu root if it is formatted EXT4, so format it EXt3 instead.
Using the automatic installation will always install grub to the MBR, so at the install screen select Something Else and set up your partitions manually, making sure the install for grub is the root partition."
I'll try to check from a linux live-usb if there is a grub installation in /dev/sdc1