Dell PowerVault MD1220 - Manual (Page 21)

Operating Your Storage Enclosure
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Figure 2-1. Connecting a SAS Cable
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.
1 SAS cable 2 pull-tab
1 2
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