I haven't finished reading the docs yet, but this part[1] caught my attention:

> When a backend is unmounted, all of its secrets are revoked and its data is deleted.

If a backend is similar to a filesystem as mentioned in the docs, that's quite a surprise. If a backend is like a filesystem, the secrets (files) should become unavailable when unmounted, but should become available again after remounting the backend (filesystem).

Are the secrets actually _deleted_ (ie, can't be recovered again), or am I misunderstanding?

[1] http://vaultproject.io/intro/getting-started/secret-backends...