Storage Spaces provides a new class of sophisticated virtualization...
Storage Spaces provides a new class of sophisticated virtualization enhancements to the storage stack that you can use to pool multiple physical hard disk units together and provide feature-rich, highly resilient, and reliable storage arrays to your workloads.
You can use Storage Spaces to create storage pools, which are virtualized administration units that are aggregates of physical disk units. With these storage pools, you can enable storage aggregation, elastic capacity expansion, and delegated administration. You can also create virtual disks with associated attributes that include a desired level of resiliency, thin or fixed provisioning, and automatic or controlled allocation on diverse storage media.