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Connecting SAS cables and power cords
IMPORTANT: The cabling figures in the following cabling topics demonstrate 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. Cabling restrictions may exist for the different installation
environments. For more information, see the user documents for your controller or controller enclosure.
Cabling best practices
•
Use supported SAS cables and power cords. A variety of cables and cable lengths are supported for use with this disk
enclosure. For more information, see the HPE D3000 Enclosures QuickSpecs on the Accessing QuickSpecs website.
•
Use the shortest possible cable between devices. Shorter cables reduce the possibility of signal degradation that might
occur over longer distances. In addition, shorter cables are easier to manage and route along the back of the rack.
•
Gather cables in the rear of the disk enclosure to ensure that the cabling in the back of the rack system does not
interfere with system operation or maintenance. Bind cables loosely with cable ties and route the cables out of the
way, along the side of the rack. When the cables are tied together and routed down the side of the rack, system
components and indicators are easily visible and accessible.
•
Bind and support cables in a manner that eliminates stress on connectors and tight bends of the cables. This prevents
damage to the connector and cable, and ensures that the connector remains fully seated in the port.
•
Attach a label near both ends of each cable to identify the device connected to that cable. Include the device, device
name, port, or other useful information.
•
Use colored markers to color code both ends of each cable, to help visually identify a particular cable without having to
read or locate the label.
•
In multipath configurations, you might want to loosely bind the matching pair of cables connecting devices.
Cabling guidelines–disk enclosure to server or controller enclosure
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.
•
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.
•
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.
•
In dual-domain configurations, two cable paths are created between the host, the primary disk enclosure, and
additional cascaded disk enclosures.
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.
17
Installing
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