HP XP P9500 Storage - Manual (Page 21)

The example on the left (Today), before installing Thin Provisioning software, shows higher starting
cost because a larger amount of physical disk capacity is purchased to configure the entire volume
capacity. Much of this hardware-centric capacity is unused at the start. Over time, you will have
to reconfigure the storage based on the volume capacity to be consumed, for example, if the
volume capacity exceeds 80% after one year.
The example on the right (Future), after installing Thin Provisioning software, shows lower starting
costs for purchasing minimal volume capacity. Additional physical disk capacity can be purchased
and installed only when more physical storage is required, indicated by a system alert. This software
approach allows the volumes to be used effectively. Reconfiguring the storage system can be
eliminated so that operations can continue without service interruptions.
Thin Provisioning work flow
The following illustrates the Thin Provisioning workflow.
Thin provisioning 21