Huawei's SmartThin technology is a thin provisioning feature that allows storage administrators to allocate more logical capacity to servers than is physically available in the storage pool. Traditionally, 'thick provisioning' reserves the entire capacity of a LUN the moment it is created, leading to significant 'stranded' or wasted space if the application does not immediately use it.

With SmartThin, the storage system only consumes physical blocks when data is actually written to the disk. This 'on-demand' allocation ensures that physical resources are shared across multiple LUNs more efficiently. For example, a 10 TB LUN might be presented to a database, but if the database only contains 2 TB of data, only 2 TB of physical space is consumed. This significantly improves the Storage Resource Utilization Rate and reduces the Total Cost of Ownership (TCO) by delaying the need to purchase additional physical disks until the actual consumed capacity approaches the physical limits of the array.