Definition
IBM FlashSystem is IBM's family of all-flash and hybrid enterprise storage arrays, running on IBM's Storage Virtualize software and typically populated with FlashCore Module NVMe drives. FlashSystem arrays attach to IBM Power and IBM i environments through supported SAN host adapters, making them a common external storage option once internal DASD capacity or performance is exhausted.
For IBM i buyers specifically, FlashSystem storage decisions usually come up alongside external SAN attachment planning rather than as a standalone purchase, since the array itself is shared infrastructure that can also serve other platforms in the same data center.