IBM MTM 2145-12F, Hardware Installation Manual

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Be aware of the following guidelines when you attach the cables to the SAS ports.
v
No cable can be connected between a port on a left canister and a port on a
right canister of the expansion enclosures.
v Ensure that cables are installed in an orderly way to reduce the risk of cable
damage when replaceable units are removed or inserted.
v 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. USB ports can be used to initialize the system or to perform
service-related tasks by using a USB flash drive that contains executable files
for initializing the system.
– Fibre Channel and Fibre Channel over Ethernet (FCoE) ports. If your system
has an optionally installed Fibre Channel and FCoE adapter for host and
external storage attachment, ensure that these ports are accessible.
– 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 132 on page 138.
Note: Figure 132 on page 138 is provided to show the cable connections
between the SAS enclosures and each node 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 2145-92F enclosure near the bottom of
the rack.
Chapter 4. Installing an optional 5U SAS expansion enclosure
137