https://wiki.archlinux.org/index.php/Mkinitcpio#Possibly_missing_firmware_for_module_XXXX
Possibly missing firmware for module XXXX
When initramfs are being rebuild after a kernel update, you might get these or similar warnings:
==> WARNING: Possibly missing firmware for module: aic94xx ==> WARNING: Possibly missing firmware for module: wd719x
These appear to any Arch Linux users, especially those who have not installed these firmware modules. If you do not use hardware which uses these firmwares you can safely ignore this message.