Connecting Smart Disk Enclosures

Prerequisites

• The disk enclosure connection plan has been worked out.
• The following installation tools and materials have been prepared:
  • RDMA electrical/optical cables
  • Diagonal pliers
  • Cable ties

Procedure

1. Attach labels to RDMA cables.
   1. Prepare the RDMA cables for connecting controller enclosures to disk enclosures.

      RDMA cables shipped with the device have been coiled. Uncoil the cables based on site requirements to prevent unnecessary cable arrangement and binding.

   2. Prepare labels for guiding cable connections based on the disk enclosure connection plan.

      The label for connection between a 2 U controller enclosure and a disk enclosure is CTEx-A/Bx-Px TO DAExxx-A/B-Px, and that for connection between two disk enclosures is DAExxx-A/B-Px TO DAExxx-A/B-Px. The following table explains the label.

      Table 6-2 Label naming rules

      Item	Description				Example		Description
      CTEx	Controller enclosure ID				CTE0		Controller enclosure 0
      A/Bx	Slot ID of the expansion module on controller A or controller B of the 2 U controller enclosure. If an onboard expansion module is used, x is not needed.				A or B1		Onboard expansion module on controller A, or expansion module in slot IOM 1 on controller B
      DAExxx	Disk enclosure ID				DAE000		Disk enclosure 0
      Px	Port ID on the expansion module				P0		Port P0 on the expansion module

      For example: CTE0-A-P0 TO DAE000-A-P0 indicates that one end of the cable connects to port P0 on the onboard expansion module of controller A in a 2 U controller enclosure (ID: 0), and the other end connects to port P0 on expansion module A in disk enclosure 0. CTE0-B1-P0 TO DAE000-B-P0 indicates that one end of the cable connects to port P0 on the expansion module in slot IOM1 of controller B in a 2 U controller enclosure (ID: 0), and the other end connects to port P0 on expansion module B in disk enclosure 0.

      Figure 6-4 shows an example of filling in a label.

      Figure 6-4 Example of filling in a label
      

   3. Attach a pair of labels to both ends of an RDMA cable. For details on how to attach a label, see Engineering Label Specifications for Cables.

2. Connect disk enclosures following the connection plan, as shown in Figure 6-5 and Figure 6-6.
   Figure 6-5 Connecting the RDMA electrical cable
   
   Figure 6-6 Connecting the RDMA optical cable
   

3. Adjust the length of the RDMA cables by wrapping them into circles according to the distance away from the cabinet, and use a cable tie to bind them and use diagonal pliers to trim off the excess of cable ties, as shown in Figure 6-7.

   After RDMA cables are connected, fix extra cables onto the cable tray at the rear of the cabinet by using fiber binding tapes.

   Figure 6-7 Routing and binding RDMA cables
   

   For details about how to route and bind cables, see General Cable Routing Description and Cable Routing and Bundling Basics.