Question

While performing the volume status checks, if the status is insufficient data, what does it mean?

Answer 1

While performing the volume status checks, status is insufficient-data mean that checks may still be in progress on the volume.

Explanation

When there is status showed "insufficient-data", it means that checks still in progress on the volume. To see the results of volume status checks that help  to identify impaired volumes and it also help you to take necessary  actions required.