The primary function of an initrd is to allow the kernel to mount the root file system. It therefore needs to contain all drivers and supporting programs required to do that.
Tamesɣant tagejdant n initrd d asireg n kernel ad iserkeb anagraw n yifuyla aẓar. Ɣef waya yesra ad ilin deg-s meṛṛa inuḍaf d usefrek n wahilen yettusran i wakken ad yeg aya.