Broadcom LSI 9212‑4i4e PCIe2.0 IT‑Mode Hybrid‑Port SAS Host Bus Adapter

Basic Parameter Table

Core Product Features

1. Hybrid‑port PCIe 2.0 HBA (Host Bus Adapter) built‑on SAS2008 chip, factory‑flashed to native IT pass‑through firmware. It has no hardware‑RAID function, forwarding raw disk‑data directly to the host OS. It is designed for hybrid‑storage servers which combine local internal hard‑drives and external JBOD disk‑shelf expansion on one single controller card, widely‑used for ZFS, TrueNAS, FreeNAS, unRAID.
2. PCIe 2.0 x8 bandwidth: three SFF‑8087 internal ports support up to 4 in‑chassis local drives; one SFF‑8644 external port supports up to 4 drives inside an external JBOD enclosure, for a maximum of 8 disks.
3. IT‑mode pass‑through architecture lets the operating system manage every disk independently for software‑defined‑RAID (ZFS‑RAID‑Z, md‑raid). There is no onboard cache or hardware‑RAID calculation offload.
4. Fan‑less passive black heat‑sink, zero‑noise operation, stable for 24/7 long‑term continuous runtime in rack‑mounted datacenter servers. It comes with full‑height and low‑profile brackets for different server chassis.
5. Supports hot‑swap for both internal local hard drives and external JBOD drives; all disks are presented directly to the host operating system.
6. Main‑use case: hybrid NAS systems with in‑server storage plus external backup disk shelves.

Application Scenarios

• Hybrid‑storage NAS (local internal disks + external JBOD expansion)
• Small‑enterprise file‑servers with internal storage plus off‑board backup JBOD
• NVR surveillance systems combining internal storage and external archive disk enclosures
• Home‑lab ZFS NAS with mixed local and external JBOD storage