One word that, I believe, IBM originally coined was the concept of a storage pool.
This is, simply, "a place where you can put files." Notez vous...
- It does not say anything about which disk-volumes may contain the information.
- It does not even imply that a single file must reside wholly upon any particular volume.
- It does not imply that only one physical copy of a particular file may exist.
- The concept is intentionally abstracted from the original concept that "a mount-point equals a physical disk and a file lives there."
This is what enables a data-center to liberate itself from the "one drive, per drive" mentality and to reasonably support what might be a disk-farm of hundreds
of spindles, and to manage that storage space effectively on an on-going basis. Depending on the implementation, it also presents us with the opportunity of making part of the management-problem into something that a computer
can help us to solve and manage.