The storage controller is a VSP One SDS Block process that manages the capacities and volumes of storage nodes. The capacity of each storage node is managed by the storage controller. The storage controller monitors the system configuration and usage and automatically performs capacity expansion.
As many storage controllers as storage nodes exist, and multiple storage controllers are operating. The total storage pool capacity is the sum of the individual capacities managed by the storage controllers.
Triggers for capacity expansion
Make the capacity added by storage pool expansion or capacity reserved for Rebuild (data reconstruction) available for user data.
Capacity expansion is mainly performed when:
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A storage pool is expanded.
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Capacity usage of a storage pool increases.
Estimated processing time
For the time required for capacity allocation processing to storage controllers, see Approximate processing time for allocating capacity to storage controllers (physical capacity) in this document.