Broadcom 96xx User Guide
Broadcom
®
96xx PCIe 4.0, 24G SAS MegaRAID
™
and eHBA Tri-Mode Storage Adapters
Tri-Mode Storage Interface
The tri-mode interface groups phys into two CSW blocks that contain 16 phys each. Depending on the adapter, either one
or both CSW blocks are used for the storage interface. Limitations exist on how the phys can be grouped to create wide
ports for SAS/SATA or multilane ports for PCIe.
The following table indicates how the connectors map to the phys within each CSW. Card layout figures in Broadcom
MegaRAID and eHBA Tri-Mode Storage Adapter Characteristics show the connector designations for each adapter.
Table 3: Adapter Connector-to-CSW Port Associations
Adapter Connector 0 Connector 1 Connector 2 Connector 3
9670W-16i CSW1[0:7] CSW1[8:15] — —
9670-24i CSW1[0:7] CSW1[8:15] CSW0[8:15] —
9660-16i CSW0[0:7] CSW1[0:7] — —
9620-16i CSW1[8:15] CSW0[8:15] — —
9600-24i CSW1[8:15] CSW0[8:15] CSW1[0:7] —
9600-16i CSW1[8:15] CSW0[8:15] — —
9600-8i8e CSW1[0:7] CSW0[12:15] CSW0[8:11] —
9600W-16e CSW0[12:15] CSW0[8:11] CSW0[4:7] CSW0[0:3]
9600-16e CSW0[12:15] CSW0[8:11] CSW0[4:7] CSW0[0:3]
The internal adapters can direct attach to SAS, SATA, or NVMe drives. The internal and external adapters support drive
attach through PCIe switches or expanders.
NOTE
Carefully assess any decision to mix SAS and SATA drives within the same virtual drive (VD). Although you can
mix drives, the practice is discouraged.
MegaRAID does not permit mixing SAS and NVMe drives or SATA and NVMe drives within the same VD. To mix
NVMe and SAS/SATA drives on a MegaRAID adapter, you must configure the drives in separate VDs.
The following sections describe the connector options for a single direct-attach type solution. Adhere to the same
guidelines if you combine device types.
SAS/SATA Support
The storage interface is comprised of either 24 phys or 16 phys, depending on the adapter. Dedicated SAS phy
management hardware manages the phys in groups of eight within each CSW: CSW0[0:7], CSW0[8:15], CSW1[0:7], and
CSW1[8:15]. Depending on the adapter, one or more of these CSW groups are used for the SAS/SATA interfaces and
these SAS phy management hardware instances cannot communicate with each other.
When you configure a wide port, the connections must attach exclusively to phys all managed by the same CSW group.
If the ports are not managed by the same CSW group, unexpected controller and host behavior occurs. You can create
combinations of a x1 to x8 wide link within CSW0[0:7], CSW0[8:15], CSW1[0:7], or CSW1[8:15]. You cannot create a wide
link by spanning RX/TX pairs between CSW0 and CSW1 or between phys 8:15 and 0:7 within the same CSW group.
Broadcom
96xx-MR-HBA-Tri-Mode-UG108
11
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