The most common form factors for HDDs in enterprise systems are 2. what's your idea about the future of LFF and SFF arrays? Is there any trend you can see for new systems with a support for SFF disks only? Thanks! Anton. Small Form Factor (SFF) / 2. LFF or SFF hard drives? - Hi i have colocation with much servers which using LFF hard drivers at the moment i need to add more server to our.