Namespace – In NVMe terms a namespace is a set of logical block addresses (LBAs) on an NVMe SSD and they form a logical partition. There can be more than one namespace on an NVMe SSD. The namespace can have a namespace ID to identify it. The NVM Express organisation says: “There are many reasons why host software would want to break up an NVMe SSD into multiple namespaces: for logical isolation, multi-tenancy, security isolation (encryption per namespace), write protecting a namespace for recovery purposes, over-provisioning to improve write performance and endurance and so on.