[[add-tier]]
== Add a missing tier to the system

The allocation of indices in an {es} deployment can be allocated on <<data-tiers, data tiers>>.

In order to allow indices to be allocated, follow these steps to add the <<data-tiers, data tier>>
the indices expect to be allocated on to your deployment:

include::{es-ref-dir}/tab-widgets/troubleshooting/data/add-tier-widget.asciidoc[]