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2. If additional expansion enclosures are installed, connect each one to the
previous expansion enclosure as shown in Figure 28 on page 42.
a. Use one cable to connect SAS port 2 of the left expansion canister in the
previous expansion enclosure to SAS port 1 of the left expansion canister in
the newly installed expansion enclosure.
b. Use the second cable to connect SAS port 2 of the right expansion canister
in the previous expansion enclosure to SAS port 1 of the right expansion
canister in the newly installed expansion enclosure.
Note: A control enclosure can support up to nine expansion enclosures.
SAS cabling guidelines
When connecting SAS cables between enclosures, you must follow a list of
guidelines to ensure that your configuration is valid.
Orienting the connector
When inserting SAS cables, make sure the connector (Figure 29) is oriented
correctly.
v The orientation of the connector must match the orientation of the port before
you push the connector into the port. The cable connector and socket are keyed,
and it is important that you have proper alignment of the keys when the cable is
inserted.
v The blue pull tab must be below the connector.
v 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.
v When inserted correctly, the connector can only be removed by pulling the tab.
v When both ends of a SAS cable are inserted correctly, the green link LEDs next
to the connected SAS ports are lit.
Figure 29. SAS cable connectors
Guidelines
Be aware of the following guidelines when you begin to attach the cables to the
SAS ports.
v No more than nine expansion enclosures can be chained to port 4 of a node
canister.
Chapter 2. Installing the hardware
43
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