Dell Unity™ All Flash and Unity Hybrid Unity 480/F, Unity 680/F, Unity 880/F Hardware Information Guide

DPEI/O module types

I/O module installation priority

There are two I/O module slots per SP assembly: slot 0 and slot 1. Slot 0 has a 16 lane PCIe channel, and slot 1 has an eight lane PCIe channel.

Populate new I/O modules in the following order to take advantage of the increased speed on slot 0. If two I/O modules are ordered, use the same installation priority for both I/O modules.

4-port 32Gb Fibre Channel I/O module
4-port 25GbE Optical I/O module
4-port 16Gb Fibre Channel I/O module
4-port 10GbE BaseT I/O module
4-port 12Gb SAS backend I/O module

When adding new I/O modules, always install I/O modules in pairs: one module in SP assembly A and one module in SP assembly B. Both SP assemblies must have the same type of I/O modules in the same slots.

I/O module LED status

Table 1. DPEI/O module LEDs
LED	State	Description
Port link	Green or blue	Link up
Port link	Off	Link down
Power fault	Green	Power on
Power fault	Amber	Power fault

4-port 32Gb Fibre Channel I/O module

The 4-port 32Gb Fibre Channel I/O module is used to serve Fibre Channel block protocol over SAN to hosts for the platform. Each port employs an optical SFP+ connection that supports 16 Gb and 32 Gb SFPs. 16 Gb SFPs support speeds of 4 Gb/s, 8 Gb/s, and 16 Gb/s. 32 Gb SFPs support speeds of 8 Gb/s, 16 Gb/s, and 32 Gb/s.

4-port 25GbE Optical I/O module

The 4-port 25GbE Optical I/O module is an Ethernet I/O module that is used to serve Ethernet network traffic and iSCSI block protocol to hosts for the platform. The I/O module uses an optical 10 Gb or 25 Gb capable SFP+ connection to a host or switch port, and it supports speeds of 1 Gb/s, 10 Gb/s, and 25 Gb/s.

4-port 16Gb Fibre Channel I/O module

The 4-port 16Gb Fibre Channel I/O module comes with four optical ports, one power and fault LED, and a combination link and activity LED for each optical port. This I/O module can interface at speeds of 4 Gb/s, 8 Gb/s, and 16 Gb/s FC for host or initiator layered connections.

NOTE:For the 480/480F, 680/680F, and 880/880F systems. you can upgrade from a 4-port 16Gb Fibre Channel I/O module to a 4-port 32Gb Fibre Channel I/O module . For information on how to perform this procedure, refer to the Dell Unity 480/F, 680/F, and 880/F Field Replacement Guide.

4-port 10GbE BaseT I/O module

The 4-port 10GbE BaseT I/O module can interface at speeds of 1 Gb/s and 10 Gb/s and supports both IP(file) and iSCSI (Block) on the same SP assembly. Ports can be configured as both IP and iSCSI simultaneously. The I/O module comes with four 10-Gb/s RJ-45 ports, one power/fault LED, activity LED, and link LED for each port.

4-port 12Gb SAS backend I/O module

Where supported, the 4-port 12Gb SAS backend I/O module comes with four x4 lane mini-SAS high density (HD) ports, one power and fault LED, and a combination link and activity LED for each port. Install this I/O module into the SP assembly to provide additional SAS buses. Labeled 12 Gb SAS v1.

NOTE:The optional back-end 12-Gb/s SAS module is only supported on Unity 480F, Unity 680F, and Unity 880F systems.

The 4-port 12Gb SAS backend I/O module can also be configured to support x8 lane cabling for the 80-drive DAE by combining ports 0 and 1 as back-end 2, or ports 2 and 3 to create back-end 4. The I/O module can also be configured to support both x4 lane and x8 lane back-ends simultaneously.

NOTE: If the 4-port 12Gb SAS backend I/O module is to be configured for x8 lane cabling, the x8 lane cable must be inserted into the I/O module before persisting it. If the x8 lane cables are not inserted into the I/O module first, all four ports default to x4 lane ports.