LSI Logic 6Gb/s 4-Internal 4-External Port PCIe 3.0 SAS/SATA Host Bus Adapter

The LSI Logic H5-25434-00 is a 6Gb/s PCIe 3.0 SAS/SATA Host Bus Adapter (HBA) with 4 internal and 4 external ports, providing 8-port SAS/SATA connectivity for enterprise servers and storage arrays. Based on LSI's proven SAS HBA technology, it delivers reliable direct-attach and expander-connected SAS/SATA storage connectivity for data center and workstation environments requiring both internal and external SAS port flexibility.

Key Features

• 8 total SAS/SATA ports — 4 internal (SFF-8087) + 4 external (SFF-8088)
• 6Gb/s SAS/SATA — dual-protocol for mixed SAS and SATA drive environments
• PCIe 3.0 host interface for low-latency, high-bandwidth HBA connectivity
• LSI IT mode capable — pass-through for software RAID (ZFS, mdadm) deployments
• Supports SAS expanders for scalable large storage array connectivity

Product Specifications

• Part Number: H5-25434-00
• Manufacturer: LSI Logic (Broadcom)
• OEM Status: OEM
• Ports: 4x Internal (SFF-8087) + 4x External (SFF-8088)
• Interface Speed: 6Gb/s SAS/SATA
• Host Interface: PCIe 3.0
• Protocol: SAS / SATA

Interface Specifications

• Internal Ports: 4x SFF-8087 (Mini-SAS, 4 lanes each = up to 16 drives internal)
• External Ports: 4x SFF-8088 (external Mini-SAS)
• Interface Speed: 6Gb/s per port
• Host: PCIe 3.0 x8
• Protocol: SAS 6Gb/s / SATA 6Gb/s

Port Specifications

• Total Ports: 8 (4 internal + 4 external)
• Internal Connector: SFF-8087 Mini-SAS x4
• External Connector: SFF-8088 Mini-SAS x4
• Max Drives (direct): Up to 16 internal + 16 external (with SAS expander)
• RAID Support: IR mode (RAID 0/1/10) or IT mode (HBA pass-through)

Use Cases

• Enterprise server SAS/SATA HBA for direct-attach internal and external storage
• IT mode pass-through HBA for ZFS, TrueNAS, and software RAID deployments
• SAS expander connectivity for large JBOD storage arrays
• Workstation and server storage expansion requiring mixed internal + external SAS ports

Compatibility

• Compatible with PCIe 3.0 x8 server and workstation motherboards
• Supports SAS and SATA drives and SSDs
• IT mode firmware flash available for HBA pass-through (ZFS/software RAID)
• Compatible with SAS expanders for large-scale drive connectivity

Frequently Asked Questions

What is IT mode on an LSI HBA?

IT (Initiator Target) mode is a firmware mode that makes the HBA function as a pure pass-through controller — exposing each drive directly to the OS for use with software RAID solutions like ZFS, mdadm, or TrueNAS without hardware RAID involvement.

What cables connect to the SFF-8087 internal ports?

SFF-8087 is a Mini-SAS 4i connector — use SFF-8087 to SATA breakout cables for SATA drives or SFF-8087 to SFF-8482 cables for SAS drives. Each SFF-8087 port connects up to 4 drives.

Can the H5-25434-00 connect to external JBOD enclosures?

Yes — the 4 external SFF-8088 ports connect to external JBOD enclosures and SAS expanders using SFF-8088 to SFF-8088 external mini-SAS cables.

The LSI Logic H5-25434-00 delivers flexible 6Gb/s SAS/SATA connectivity with 4 internal and 4 external ports on PCIe 3.0 — ideal for enterprise server storage, IT mode pass-through deployments, and external JBOD expansion. Order today and maximize your SAS/SATA storage connectivity with proven LSI Logic HBA reliability.