The system supports several ways to monitor capacity usage to ensure that physical storage is sufficient for host workloads.
Depending on the complexity of your system configuration, monitoring pools and MDisk might be easier to identify which external storage system needs more capacity. If external storage systems are shared across several pools, analyzing MDisk capacity usage can be easier to determine whether more capacity is needed. If capacity from storage system is shared across different pools, provisioning groups are created. Provisioning groups are objects that identify whether storage is shared across multiple pools. The MDisks by Pools page in the management GUI, displays all pools and their assigned MDisk. If you are not sure whether external storage systems are shared across several pools, right-click the pool and select View Resources to display the provisioning group that is associated with the pool.
If your system configuration dedicates specific storage systems to individual pools, analyzing the pool capacity usage can determine whether more capacity is needed. On the Pools page, check each MDisk in the pool for capacity and use the value for Storage System - LUN to determine the external storage system that provides the MDisk with space.