What is a benefit of virtual storage provisioning over traditional provisioning?
A. Enables more efficient allocation of storage to hosts

B.
Can be used for applications that require predictable performance

C.
Provides full control for precise data placement

D.
Does not enable oversubscription

Explanation:
Virtual Storage Provisioning
Virtual provisioning enables creating and presenting a LUN with more capacity than is physically
allocated to it on the storage array. The LUN created using virtual provisioning is called a thin LUN
to distinguish it from the traditional LUN.
Thin LUNs do not require physical storage to be completely allocated to them at the time they are
created and presented to a host. Physical storage is allocated to the host “on-demand” from a
shared pool of physical capacity. A shared pool is consists of physical disks. A shared pool in
virtual provisioning is analogous to a RAID group, which is a collection of drives on which LUNs
are created. Similar to a RAID group, a shared pool supports a single RAID protection level.
However, unlike a RAID group, a shared pool might contain large numbers of drives. Shared pools
can be homogeneous (containing a single drive type) or heterogeneous (containing mixed drive
types, such as flash, FC, SAS, and SATA drives).
Virtual provisioning enables more efficient allocation of storage to hosts. Virtual provisioning also
enables oversubscription, where more capacity is presented to the hosts than is actually available
on the storage array. Both shared pool and thin LUN can be expanded nondisruptively as the
storage requirements of the hosts grow. Multiple shared pools can be created within a storage
array, and a shared pool may be shared by multiple thin LUNs.
EMC E10-001 Student Resource Guide. Module 4: Intelligent Storage System