An enclosure is the basic housing unit for the system. It is the rack-mounted hardware that contains all the main components of the system: canisters, drives, and power supplies. The term enclosure is also used to describe the hardware and other parts that are plugged into the enclosure.
The system has two different types of enclosures: control enclosures and expansion enclosures. A control enclosure manages your storage systems, communicates with the host, and manages interfaces. In addition, each control enclosure can have multiple attached expansion enclosures, which expand the available capacity of the existing control enclosure. Lenovo Storage V3700 V2 and Lenovo Storage V3700 V2 XP systems can support one control enclosure with one chain of optional expansion enclosures. Lenovo Storage V5030 systems can support up to two control enclosures with one or two chains of expansion enclosures per control enclosure.
An expansion enclosure houses the following additional hardware: power supply units (PSUs), canisters, and drives. Enclosure objects report the connectivity of the enclosure.
A Lenovo Storage V series expansion enclosure can only be used with a Lenovo Storage V series control enclosure. A Lenovo Storage V series control enclosure can only manage a Lenovo Storage V series expansion enclosure.