Connecting SAS cables to the server or controller enclosure
To connect the first disk enclosure to the server or controller enclosure, use a standard mini-SAS
cable.
IMPORTANT: When connecting this disk enclosure in a single-domain environment, only the
top I/O module (I/O module A) in the disk enclosure is supported for use.
Observe the following guidelines:
• Only use supported SAS cables with mini-SAS connectors.
• Ensure that the servers or controller enclosures are powered down and power cords are
disconnected before connecting SAS cables to the disk enclosure.
The following illustration demonstrates connecting a disk enclosure to a server with an installed
controller. In your environment, the disk enclosure might connect to a controller enclosure, which
then connects to the host or network. Regardless of environment, cabling principles from the
disk enclosure to the host are the same.
Note the following when connecting cables:
• P1 on the disk enclosure I/O module is treated as the SAS “in” port.
• P2 on the disk enclosure I/O module is treated as the SAS “out” port.
• In single-domain configurations, one cable path is created between the host, the primary
disk enclosure, and additional cascaded disk enclosures. (Shown)
• In dual-domain configurations, two cable paths are created between the host, the primary
disk enclosure, and additional cascaded disk enclosures.
Connecting SAS cables and power cords 35
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