Assertion: optical disk | /r/HasAspect | reflective surface
Facets:
value: typically
type: DEGREE
Source sentences:
text: Unlike mechanical disks with permanent housing such as hard drives, and solid-state devices like flash memory which generally has inexpensive but tough housing, optical discs typically have a reflective surface that can get damaged at relatively low thresholds of surface damage, in which if damage is just accidental, it could mean rendering it unusable.