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146 DS8000 Series: Concepts and Architecture
Installing on raised or nonraised floors
You can install your DS8000 storage units on a raised or nonraised floor.
However, installing the models on a raised floor provides the following benefits:
Improves operational efficiency and allows greater flexibility in the arrangement of
equipment.
Increases air circulation for better cooling.
Protects the interconnecting cables and power receptacles.
Prevents tripping hazards because cables can be routed underneath the raised floor.
Aesthetically more appealing.
Meeting floor load requirements
Use the following steps to ensure that your location meets the floor load requirements and to
determine the weight distribution area required for the floor load:
1. Find the concrete sub-floor load rating in the location where you plan to install the storage
units. Refer to Chapter 4, “Meeting DS8000 delivery and installation requirements” in the
IBM TotalStorage DS8000 Introduction and Planning Guide, GC35-0495.
2. Determine whether the floor load rating of the location meets the following requirements:
– The design target used by IBM is 342 kg per m
2
(70 lb per ft
2
).
– When you install a storage unit, which includes both base models and expansion
models, the minimum floor load rating is 361 kg per m
2
(74 lb per ft
2
). At 342 kg per m
2
(70 lb per ft
2
), the side dimension for the weight distribution area exceeds the 76.2 cm
(30 in.) allowed maximum, as defined in IBM Corporate Standards.
– The per caster transferred weight to a raised floor panel is 450 kg (1000 lb).
Calculating space requirements
When you are planning the installation location, you must first calculate the total amount of
space that is needed for the storage units.
Use the following steps to calculate enough space for your storage units:
1. Determine the dimensions of each model configuration in your storage units. Table 8-2 on
page 147 provides the dimensions of the DS8000 models.
Important: Any expansion units within the storage unit must be attached to the base
model on the right side (as you face the front of the units).
Important: If you do not know or are not certain about the floor load rating of the
installation site, be sure to check with the building engineer or another appropriate
person. A structural engineer may be needed to assist in this evaluation.