What is IBM FlashSystem storage?

IBM FlashSystem is IBM's family of external all-flash storage arrays, built on Storage Virtualize software and populated with FlashCore Module (FCM) NVMe drives. It attaches to servers, including IBM Power and IBM i environments, over Fibre Channel SAN. When comparing resellers, ask which FlashCore Module generation (FCM1 through FCM4) and capacity they are quoting, and whether Storage Virtualize licensing for replication, encryption, and tiering is included or sold separately.