After you install 5U expansion enclosures into the rack, you must connect them to each
system that will use them.
About this task
This task applies if you are installing a 5U expansion enclosure.
Note: When you insert SAS cables, ensure that the connector is oriented correctly to the control
enclosure and expansion enclosure.
For systems and
2U expansion enclosures, the blue pull tab must be below the cable
( 1 in Figure 1).Figure 1. SAS cable connector orientation
For 4657-92G4657-92G 5U expansion enclosures,
the blue pull tab must be above the connector ( 2 in Figure 1).
Insert the connector gently until it clicks into place. If you feel resistance, the connector is
probably oriented the wrong way. Do not force it.
When inserted correctly, the connector can be removed only by pulling the tab.
Be aware of the following guidelines when you attach the cables to the SAS ports.
No cable can be connected between a port on a left canister and a port on a right canister of
the expansion enclosures.
Ensure that cables are installed in an orderly way to reduce the risk
of cable damage when replaceable units are removed or inserted.
SAS cables must be routed through the cable management arms to reduce the risk of disconnecting
the nodes from their storage arrays. This step also helps to protect the SAS cables from getting
damaged if you slide the node or enclosure out of the rack while they are attached. Arrange your
cables to provide access to the following components:
Ethernet ports, including the technician port. The technician port is used for initial setup of
the system by directly attaching to a personal computer. It can also be used to complete service
actions for the system.
USB ports.
The nodes and the enclosures themselves. Access is required to the hardware for servicing and
for safely removing and replacing components by using two or more people.
Procedure
If more I/O groups are configured, repeat the cabling procedure for the other I/O groups. Each
system can have a maximum of four I/O groups, with two chains of expansion enclosures attached to
each I/O group. Two chains of expansion enclosures can be attached to each I/O group. On each SAS
chain, the systems can support up to a SAS chain weight of 5.
Note: For systems on version 8.5.0.5 or higher, on each SAS chain, the
systems can support up to a SAS chain weight of 6.