Dell PowerVault MD2412 Manuel du propriétaire - Page 15
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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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