Eu tenho dois discos rígidos ( /dev/sda e /dev/sdb ).
Quando eu faço update-grub , ele considera /dev/sda e /dev/sdb .
Existe alguma maneira de fazer update-grub apenas para /dev/sda ?
UPDATE
Eu tentei:
sudo update-grub /dev/sda
Resultado: (considerado sdb )
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-3.13.0-30-generic
Found initrd image: /boot/initrd.img-3.13.0-30-generic
Found linux image: /boot/vmlinuz-3.13.0-29-generic
Found initrd image: /boot/initrd.img-3.13.0-29-generic
Found linux image: /boot/vmlinuz-3.13.0-24-generic
Found initrd image: /boot/initrd.img-3.13.0-24-generic
Found memtest86+ image: /boot/memtest86+.elf
Found memtest86+ image: /boot/memtest86+.bin
Found Windows 7 (loader) on /dev/sda1
Found Arch on /dev/sdb1 # << Founded Arch on sdb !!!!
done