â 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
1. Install the cables, as shown in Figure 124 on page 111.
Note: Figure 124 on page 111 shows the cable connections between the SAS enclosures and the
control enclosure. It does not imply or represent the precise racking order for the enclosures in a rack.
However, due to its size and weight, always place the 2076-92F enclosure near the bottom of the rack.
Figure 124. Connecting the SAS cables
2. If more I/O groups are conîłgured, 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 10.
Combining 2U and 5U expansion enclosures
About this task
As Figure 124 on page 111 shows, you can combine , 2145-12F , and 2076-92F enclosures in a SAS
chain. The limiting factor is the combined chain weight of the various components. The maximum SAS
chain weight that can be attached to a node SAS port is 10:
⢠2076-92F enclosures have a chain weight of 2.5
Chapter 2. Installing the system hardware
111
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