Chapter 4: Connecting Sas And Power Cables; Connect Sas Cables - Dell PowerVault MD2412 Owner's Manual

Connect SAS cables to the host system and then connect the power cables to the enclosure.

Connect SAS cables

You can cable the storage enclosure using either a four-port HBA or a two-port PERC:
● A four-port SAS HBA supports up to eight MD2412 enclosures or four MD2424 enclosures.
● A two-port PERC adapter supports up to four 2U enclosures.
Make sure that you follow these instructions when you are connecting enclosures in a chain configuration:
● Always use SAS4 cables for connections between enclosures. Refer to your system deployment information for specific
details about connecting enclosures.
○ When a SAS4 cable is connected to a SAS4 HBA, the SAS LEDs on the EMMs turn green to indicate that the port link is
working at the SAS4 speed.
○ When a SAS4 cable is connected to a SAS3 HBA, the SAS LEDs on the EMMs turn amber to indicate that the port link is
working, but at a degraded speed.
● This enclosure only supports redundant configurations. Both EMMs must be connected to the server for the enclosure to
function properly.
● These enclosures do not support asymmetrical cabling. All cables must run from top to bottom or bottom to top in a stack.
● Do not connect different enclosure models in a chain configuration.
Figure 13. Example of SAS4 cabling for an MD2412 using a four-port SAS HBA
Connecting SAS and power cables
Connecting SAS and power cables
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