FlashSystem for IBM i and IBM Power
How IBM FlashSystem fits IBM i and IBM Power environments through Fibre Channel SAN, VIOS design, multipath planning, and storage modernization.
For IBM i and AS/400 shops, FlashSystem is usually an external SAN decision, not a replacement for every internal disk decision. The right design depends on host adapters, VIOS, multipath, zoning, partition layout, backup method, and the recovery architecture around the Power server.
IBM Power storage paths
| Storage Path | Typical Role | Decision Question |
|---|---|---|
| Internal NVMe | Local boot, compact workloads, direct server capacity. | Does the workload need shared SAN services or just local storage? |
| NED24 and expansion drawers | Additional direct-attached Power storage. | Is this a Power chassis expansion decision rather than a SAN decision? |
| IBM FlashSystem | Shared block storage, virtualization, replication, cyber resilience, multi-host access. | Which hosts, fabrics, and recovery requirements must the array serve? |
Power Planning Checklist
Host adapters
Confirm supported Fibre Channel or Ethernet attachment options for the exact Power model and partition design.
VIOS design
Decide whether IBM i accesses storage directly or through VIOS, then document redundancy and maintenance paths.
Multipath
Validate path count, zoning, preferred paths, and failover behavior before production cutover.
Recovery model
Treat snapshots, replication, backup, Cyber Vault, and IBM i save strategy as one recovery design.