menuentry 'New Install' {
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
linux /boot/newinstall/vmlinuz
initrd /boot/newinstall/initrd.gz
}above is from installation manual, i use it, grub says can't find vmlinuz i boot installer from buster, installed at sda4, i wonder if i shall change hd0 to hd3 in line 4 above
