You need more than one warehouse and different inventories? Use the Warehouses functions for this purpose.
As a merchant who has different inventories, you need to manage the stocks of products and the respective availability of them for your shop. The Multi-Inventory functionality ensures, that products can be purchased independent of the inventory location, as long as they are available in one of them. Depending on the scenario, availability can be managed via warehouse groups and with priorities, in addition to being configured using the Rule Builder.