Connecting SAS cables and power cords
After installing the enclosure in a rack, connect the SAS cables and power cords.
Cabling best practices
Use the shortest possible cable between devices. Shorter cables are easier to manage and route
along the back of the rack. In addition, shorter cables reduce the possibility of signal degradation
that might occur over longer distances.
Gather the 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 the cables loosely with
cable ties and route the excess 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.
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
Connecting SAS cables to the server or controller enclosure
To connect the first disk enclosure to the server or controller enclosure, use a supported SAS cable.
The left connector on the I/O module is for input from the server or controller enclosure. The right
connector on the I/O module is for output to an additional enclosure. See the icons on the cables and
the enclosure to assist in proper connection.
Observe the following guidelines for SAS cabling:
Only use supported SAS cables with 3-GB connectors.
Ensure that the servers or controller enclosures attached to the disk enclosure are powered down
and power cords are disconnected before connecting SAS cables.
A 0.5-m (1.64-ft) SAS cable ships standard with the enclosure. HP recommends using the shortest
cable possible, however, other supported cable lengths between SAS ports are 2 m (6.56 ft), 4
m (13.12 ft), and 6 m (19.69 ft). To acquire different lengths, contact the nearest authorized HP
70 Modular Smart Array User Guide