HPE S7U42A Storage 128GB 48-PORT 64GB Long Wave Integrated Fibre Channel Switch Blade

HPE S7U42A 48-Port 64GB Long Wave Integrated Fibre Channel Switch Blade

The HPE S7U42A is a blade-form Fibre Channel switch module designed for integration into HPE BladeSystem or compatible blade server enclosures. At 14.33 lb, the S7U42A is a chassis-mounted fabric component — not a standalone appliance — intended for data center environments where Fibre Channel SAN connectivity is managed at the blade chassis level rather than through discrete top-of-rack switching hardware.

Overview

Fibre Channel switch blades of this class handle SAN fabric connectivity for blade server environments, eliminating external cabling between servers and the SAN fabric by integrating switching directly into the chassis midplane. The 48-port density and Long Wave optics designation in the S7U42A's product designation indicate a fabric-side port count suitable for mid-to-large blade deployments, with Long Wave transceivers supporting extended-reach inter-switch links over single-mode fiber — relevant when SAN fabric segments span across rows or data center zones rather than within a single rack.

Key Features

• Blade-Integrated Fabric: Installing the switch module inside the chassis rather than adding a standalone switch eliminates external SAN cabling per blade — meaningful in dense deployments where cabling complexity and port-count overhead on external directors drives up cost and management burden.
• 48-Port Configuration: The 48-port designation provides sufficient port density to serve a fully populated blade chassis while retaining uplink ports for inter-switch links to the core SAN fabric — avoiding the bottleneck of under-provisioned internal switching in large blade deployments.
• Long Wave Optics: Long Wave (LW) Fibre Channel operates over single-mode fiber, supporting distances well beyond the 300–500m limits of short-wave multimode links. This matters when connecting blade chassis to a central SAN director located in a separate data hall or across a campus fiber plant.
• Ethernet Interface: Management access over Ethernet means the switch blade integrates into existing out-of-band management networks without requiring a separate management bus — standard expectation for blade infrastructure in managed data center environments.
• Chassis Form Factor: At 14.33 lb, this is a substantial blade module. Verify enclosure weight capacity and bay compatibility before procurement — blade switch modules occupy specific interconnect bays and are not universally interchangeable across chassis generations.

Integration and Compatibility

The S7U42A is designed for HPE BladeSystem enclosures that support integrated Fibre Channel interconnect modules. Compatibility with a specific enclosure generation (c3000, c7000, Synergy) must be confirmed against the HPE QuickSpecs or the enclosure's compatibility matrix before ordering. Mixing long-wave and short-wave ports in the same fabric requires matching optics on both ends of every ISL — confirm transceiver type on the director or core switch before deploying LW-capable blades into an existing SW fabric.

Frequently Asked Questions

Q: What enclosures is the HPE S7U42A compatible with?

A: The S7U42A is an HPE blade switch module. Specific enclosure compatibility (c3000, c7000, Synergy frame) must be confirmed via HPE's QuickSpecs or enclosure compatibility matrix for your chassis generation. Not all blade switch modules are interchangeable across chassis families.

Q: Does the S7U42A support long-distance inter-switch links?

A: The Long Wave designation in the product name indicates single-mode fiber optic support, which enables extended-reach ISLs beyond the range of short-wave multimode links — suitable for cross-row or cross-hall SAN fabric segments. Verify distance requirements against the specific transceiver spec for your environment.

Q: How is the S7U42A managed?

A: The S7U42A exposes an Ethernet management interface, consistent with standard blade interconnect management integration into HPE Onboard Administrator or compatible out-of-band management infrastructure.

Q: What does the 128GB designation in the product name refer to?

A: The 128GB figure in the full product name refers to the switch's buffer or memory specification as described by HPE's product naming convention for this blade module. Confirm the exact specification against HPE's QuickSpecs document for S7U42A for authoritative detail.

James Everett

The S7U42A is a blade-form Fibre Channel switch module — and the distinction between blade-integrated fabric and standalone switching matters more than most buyers anticipate at procurement time. The 14.33 lb chassis weight of this module reflects a high-density interconnect blade, not a lightweight pass-through. If your enclosure bay allocation is already constrained, factor that weight and physical bay footprint into your enclosure planning before the module arrives on-site.

Technical Highlights:

• Blade Form Factor: Chassis-integrated switching eliminates the per-blade external SAN cable runs that create patching complexity in fully populated enclosures — the module occupies an interconnect bay and serves all blade server bays through the chassis midplane.
• Long Wave Fibre Channel: Single-mode LW optics extend ISL reach beyond what short-wave multimode supports — relevant when your SAN fabric core is not in the same rack or adjacent row as the blade chassis.
• Ethernet Management Interface: Out-of-band management over Ethernet integrates with standard HPE Onboard Administrator workflows, meaning no separate serial console infrastructure is required for initial commissioning or ongoing fabric management.

Deployment Considerations:

• Confirm enclosure bay type and chassis generation compatibility against HPE's official QuickSpecs before ordering — blade switch modules are bay-specific and not hot-swappable between incompatible chassis families without a full fabric redesign.
• Long Wave optics require single-mode fiber on every connected port — if your existing SAN cabling plant is multimode (OM3/OM4), you cannot directly connect LW ports without mode-conditioning patch cables or a fabric redesign.

The S7U42A is the right call for a blade data center environment where SAN fabric is growing into a multi-chassis or cross-hall topology and you need to extend ISL reach without adding a separate long-wave-capable director at every chassis location.