Hba Bifurcated Configurations - OSS -PCIe-HIB616-x16 Manual

Pcie x16 gen4 cable adapter

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x4:

Using a single SFF-8644 cable.

No need to change the dipswitches from x16 to x4, it will automatically down-train to x4 link. Make sure the Target card is set to Target mode.

4.3.2

HBA Bifurcated configurations

PCI Express bifurcation means splitting the PCI Express bus into smaller buses, and in this case splitting a 16-link width (bandwidth) on the HBA

card into a smaller chunks / branch.

Basically, dividing the HBA PCIe link width to smaller chunks/branches. Example, the OSS HBA x16 card could be bifurcated into four (4) x4 i.e.,

x4, x4, x4, x4 OR two (2) x8 i.e., x8, x8.

Note: PCIe Bifurcation does not decrease speed but only splits / bifurcates the bandwidth on the HBA (in this configuration). The HBA

bifurcation is different from PCIe slot lane bifurcation, which can be done or configured in the BIOS.

There are two supported "HBA Bifurcation Modes."

Two x8, x8 and

Four x4, x4, x4,x4, x4

One Stop Systems

HIB616x16 (Rev B) |30

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