The local volume has a PCIe connection interface over the NVMe protocol and is physically connected directly to the computing server, so it can only be created when creating a server. The local volume is not a required configuration parameter. The cloud server can be created without it.
Note: the local volume is always a system (boot) volume. It cannot be used as an additional volume.
Due to the lack of network delays, the local volume is suitable for workloads where read and write speed indicators are important. Only one local volume can be connected to the cloud server. The local volume cannot be disconnected from the cloud server and transferred to another one. You cannot create a snapshot for the local volume.
2 TB is the recommended limit for the local volume.
Only network volumes can be connected as additional volumes. More information can be found in Network volumes section.