### Problem
In Arch Linux
`mkinitcpio -p linux`

shows

``` 
Possibly missing firmware for module: aic94xx
 Possibly missing firmware for module: wd719x
```

### Solve
```
git clone https://aur.archlinux.org/aic94xx-firmware.git
cd aic94xx-firmware
makepkg -sri
```


```
git clone https://aur.archlinux.org/wd719x-firmware.git
cd wd719x-firmware
makepkg -sri
```

and then `mkinitcpio -p linux` again.

### Reference
https://wiki.archlinux.org/index.php/Mkinitcpio