What happens when tablet is 'lost'?

[David Medinets]

This question was asked at a presentation gave yesterday and I
realized that I don't know the answer. A tablet serves a specific key
of keys which is disjoint from all other tablets. Say a table has ten
tablets with perfectly distributed keys so each tablet serves 10% of
the data. If tablet A is lost, does the system lose access to the
first 10% of the data?