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Figure 67. Connecting the SAS cables
2. To add a second expansion enclosure chain to the control enclosure, use the supplied SAS cables to
connect the control enclosure to the expansion enclosure at rack position 2. Refer to Figure 67 on
page 57 for an example.
a) Connect SAS port 3 of the upper node canister in the control enclosure to SAS port 1 of the left
expansion canister in the second expansion enclosure.
b) Connect SAS port 3 of the lower node canister in the control enclosure to SAS port 1 of the right
expansion canister in the second expansion enclosure.
3. If additional expansion enclosures are installed, connect each one to the previous expansion
enclosure in a chain. Use two Mini SAS HD to Mini SAS HD cables, as shown in Figure 67 on page 57.
Note: A control enclosure can support up to 20U of expansion enclosures in two chains: 10Uin the
upper chain (above the control enclosure) and 10U in the lower chain.
4. If additional control enclosures are installed, repeat this cabling procedure on each control enclosure
and its expansion enclosures.
When using more than one control enclosure, divide the total number of expansion enclosures among
the control enclosures to enhance performance.
Chapter 2. Installing the system hardware 57
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