IBM Storwize V7000 Quick Installation Manual page 26

Note: The enclosure terminology that is used in this topic is described fully in "Step 2. Identifying the
hardware components" on page 3.
Be aware of these guidelines when you begin to attach the cables to the SAS ports:
v No more than five expansion enclosures can be chained to port 1 (below the control enclosure). The
connecting sequence from port 1 of the node canister is called chain 1.
v No more than four expansion enclosures can be chained to port 2 (above the control enclosure). The
connecting sequence from port 2 of the node canister is called chain 2.
v No cable can be connected between a port on an upper canister and a port on a lower canister.
v Attach cables serially between enclosures; do not skip an enclosure.
v The last enclosure in a chain must not have cables in port 2 of canister 1 and port 2 of canister 2.
v Ensure that cables are installed in a tidy manner to reduce the risk of cable damage when Storwize
V7000 replaceable units are removed or inserted.
v Arrange your cables to provide access to:
– The USB ports. Access is required to this port when you use the USB key to configure the system.
– The enclosures themselves. Access is required to the hardware for servicing and for safely removing
and replacing components using two or more people.
v Ensure that each SAS cable is fully inserted. A click is heard when the cable is successfully inserted.
Note: If you make a mistake during cabling and must unplug a SAS cable, pull the blue tag to release
the cable.
1. Review Table 1 and the following figures before attaching the SAS cables.
Table 1 provides a summary of how to attach the SAS cables.
Table 1. Cabling guide
From:
1 Port 1 of upper canister, control enclosure
3 Port 1 of lower canister, control enclosure
5 Port 2 of upper canister, control enclosure
7 Port 2 of lower canister, control enclosure
9 Port 2 of upper canister, expansion enclosure 1
11 Port 2 of lower canister, expansion enclosure 1
2. Attach the SAS cables from the control enclosure to the first expansion enclosure as shown in
Figure 12 on page 15. Remove the protective end covers, if necessary. The first expansion enclosure is
below the control enclosure.
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Storwize V7000 Version 6.1.0: Quick Installation Guide
To:
2 Port 1 of upper canister, expansion enclosure 1
4 Port 1 of lower canister, expansion enclosure 1
6 Port 1 of upper canister, expansion enclosure 2
8 Port 1 of lower canister, expansion enclosure 2
10 Port 1 of upper canister, expansion enclosure 3
12 Port 1 of lower canister, expansion enclosure 3