IBM DS8880 Series Introduction And Planning Manual page 145

When you install a storage system on a non-raised floor, consider the following
factors:
v The use of a protective covering (such as plywood, tempered masonite, or
plyron) is required to prevent damage to floor and carpeting while equipment is
being moved to or is relocated within the installation site.
v Concrete floors require treatment to prevent the release of dust.
Overhead cable management (top-exit bracket)
Overhead cable management (top-exit bracket) is an optional feature that includes
a top-exit bracket for managing your Fibre cables. This feature is an alternative to
the standard, floor-cable exit.
Using overhead cabling provides many of the cooling and safety benefits that are
provided by raised flooring in a nonraised floor environment. Unlike raised-floor
cabling, the installation planning, cable length, and the storage-system location in
relation to the cable entry point are critical to the successful installation of the
top-exit bracket.
Figure 14 on page 134 illustrates the location of the cabling for the top-exit bracket
for fiber cable feature. When you order the overhead-cable management feature,
the feature includes clamping hardware and internal cable routing brackets for
rack 1 or rack 2. The following notes provide more information about the
color-coded cable routing and components in Figure 14 on page 134.
1 Customer Fibre Channel host cables. The Fibre Channel host cables, which
are shown in red, are routed from the top of the rack down to I/O enclosure
host adapters.
2 Network Ethernet cable, power sequence cables, and customer analog
phone line (if used). The network Ethernet cable, in blue, is routed from the top
of the rack to the rear rack connector. The rack connector has an internal cable
to the management console. The power sequence cables and private network
Ethernet cables (one gray and one black) for a partner storage system are also
located here.
3 Mainline power cords. Two top-exit mainline power cords for each rack,
which are shown in green, are routed here.
Notes:
v A technical service representative tests the power sources. The customer is
required to provide power outlets (for connecting power cords) within the
specified distance.
v Fibre Channel host cables are internally routed and connected by either the
customer or by a technical service representative.
v All remaining cables are internally routed and connected by a technical service
representative.
Chapter 6. Delivery and installation requirements
133