Dell PowerVault MD1220 Hardware Owner's Manual - Page 21

Figure 2-1. Connecting a SAS Cable 1 2 1 SAS cable 2 pull-tab NOTE: In a unified-mode configuration, connect the host to the first EMM module (EMM 0). See Figure 2-2. For unified-mode configurations utilizing redundant paths, connect the host to the second EMM module (EMM1). See Figure 2-3. See your RAID controller documentation to ensure that the controller is properly installed. • If you are configuring your enclosure in a unified-mode configuration, connect the SAS cable from the host controller to the In port on the EMM module of the first enclosure in the daisy chain. See Figure 2-2. Attach subsequent storage enclosures in the daisy chain to the Out port on the first upchain storage enclosure. • If you are configuring your enclosure in a split-mode configuration, attach the SAS cable from the first host controller to the In port on the primary EMM module and the SAS cable from the second host controller port to the In port on the secondary EMM. See Figure 2-4. NOTE: In a split-mode configuration, you can cable the enclosure to operate in either a two-host or single-host configuration. Operating Your Storage Enclosure 21