Dell Unity™ All Flash and Unity Hybrid Hardware Information Guide

Cabling the DPE SAS module ports to create back-end buses 2 through 5

Where supported, the following example shows how to connect remaining four SAS back-end ports and shows the cable labels for these SAS cables, as well as the back-end bus and enclosure numbers for these DPE to DAE connections.

About this task

NOTE:The optional back-end 12-Gb/s SAS module is not supported on all Unity storage systems.

Cable the DAE to the 12-Gb/s SAS modules in the DPE 0, port 0 through port 3, to create back-end bus 2 through 5, BE2-BE5.

Use the following illustration to complete this cabling task:

• 2_0 side A, black, SP A B0 port 0 to DAE <w> LCC A port A
• 2_0 side B, black, SP B B0 port 0 to DAE <w> LCC B port A
• 3_0 side A, green, SP A B0 port 1 to DAE <x> LCC A port A
• 3_0 side B, green, SP B B0 port 1 to DAE <x> LCC B port A
• 4_0 side A, brown, SP A B0 port 2 to DAE <y> LCC A port A
• 4_0 side B, brown, SP B B0 port 2 to DAE <y> LCC B port A
• 5_0 side A, cyan, SP A B0 port 3 to DAE <z> LCC A port A
• 5_0 side B, cyan, SP B B0 port 3 to DAE <z> LCC B port A

For each new BE2-BE5:

1. Label a pair of mini-SAS HD cables using the appropriate labels (black, green, brown, or cyan) shown here.

   Expansion port cable labeling details			Primary port cable labeling details
   Label part number	Label	Port	Label part number	Label	Port
   046-005-679		SP A A0 PORT 0	046-021-16		LCC A Port A
   046-005-718		SP B B0 PORT 0	046-021-017		LCC B Port A
   046-005-711		SP A A0 PORT 1	046-021-018		LCC A Port A
   046-005-719		SP B B0 PORT 1	046-021-019		LCC B Port A
   046-005-935		SP A A0 PORT 2	046-021-020		LCC A Port A
   046-005-937		SP B B0 PORT 2	046-021-021		LCC B Port A
   046-005-936		SP A A0 PORT 3	046-021-022		LCC A Port A
   046-005-938		SP B B0 PORT 3	046-021-023		LCC B Port A

2. Connect each SP to the optional DAE to create BE2 enclosure 0 through BE5 enclosure 0, as needed.
   1. For SP A, connect the lowest available port in the SAS module in the bottom slot of the DPE to port A on the link control card A (LCC A) at the bottom of the DAE.
   2. For SP B, connect the lowest available port in the SAS module in the top slot of the DPE to port A on the link control card B (LCC B) at the top of the DAE.

Connect the DAE to the DPE SP slot 0 port 0 to create back-end bus 2, BE2

Connect the DAE to the DPE SP slot 0 port 0 to create back-end bus 2 (BE2) and designate this DAE as enclosure 0 of this bus. We refer to the address of this enclosure as BE2 EA0 (2_0).

NOTE:When cabling the 15-drive DAE LCC SAS ports, ensure that the cables do not overlap behind the DAE. The illustration above demonstrates the proper method for cabling to the DAE LCC SAS ports.

1. Label a pair of mini-SAS HD cables using the black labels shown here.

   Expansion port cable labeling details			Primary port cable labeling details
   Label part number	Label	Port	Label part number	Label	Port
   046-005-679		SP A A0 PORT 0	046-021-016		LCC A Port A
   046-005-718		SP B B0 PORT 0	046-021-017		LCC B Port A

2. Connect slot 0 port 0 on SP A in the bottom slot in the DPE to port A on the link control card A (LCC A) at the bottom of the DAE. []
3. Connect slot 0 port 0 on SP B in the top slot in the DPE to port A on the link control card (LCC B) at the top of the DAE. []