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Dell Storage Center SCv2000 and SCv2020 Storage System Deployment Guide

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Four Servers Connected to Dual 12 Gb 4-Port SAS Storage Controllers

A storage system with four 12 Gb front-end SAS ports on each storage controller can connect to up to four host servers, if each host server has one HBA with dual SAS ports.

About this task

This configuration includes four fault domains spread across both storage controllers . The storage controllers are connected to each host server using two SAS connections.

If a storage controller becomes unavailable, all of the standby paths on the other storage controller become active.

Steps

  1. Connect fault domain 1 (shown in orange) to host server 1.
    1. Connect a SAS cable from storage controller 1: port 1 to the SAS HBA on host server 1.
    2. Connect a SAS cable from storage controller 2: port 1 to the SAS HBA on host server 1.
  2. Connect fault domain 2 (shown in blue) to host server 2.
    1. Connect a SAS cable from storage controller 1: port 2 to the SAS HBA on host server 2.
    2. Connect a SAS cable from storage controller 2: port 2 to the SAS HBA on host server 2.
  3. Connect fault domain 3 (shown in gray) to host server 3.
    1. Connect a SAS cable from storage controller 1: port 3 to the SAS HBA on host server 3.
    2. Connect a SAS cable from storage controller 2: port 3 to the SAS HBA on host server 3.
  4. Connect fault domain 4 (shown in red) to host server 4.
    1. Connect a SAS cable from storage controller 1: port 4 to the SAS HBA on host server 4.
    2. Connect a SAS cable from storage controller 2: port 4 to the SAS HBA on host server 4.

Example

Figure 1. Storage System with Dual 12 Gb SAS Storage Controllers Connected to Four Host Servers Storage system with dual four-port storage controllers directly connected to four host servers.
  1. Server 1
  2. Server 2
  3. Server 3
  4. Server 4
  5. Storage system
  6. Storage controller 1
  7. Storage controller 2

Next steps

Install or enable MPIO on the host servers.
  • NOTE:After the Storage Center configuration is complete, run the host access wizard to configure host server access and apply MPIO best practices. For the latest best practices, see the Dell Storage Center Best Practices document on the Dell TechCenter site ( http://en.community.dell.com/techcenter/storage/).

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