34 IBM System Storage DS3500 Introduction and Implementation Guide
Create a floor plan to check for clearance problems. Be sure to include the following
considerations in the layout plan:
Determine service clearances required for each rack or suite of racks.
If the equipment is on a raised floor, determine:
– The height of the raised floor
– Anything that might obstruct cable routing
If the equipment is not on a raised floor, determine:
– The placement of cables to minimize obstruction
– If the cable routing is indirectly between racks (such as along walls or suspended), the
amount of additional cable needed
– Cleanliness of floors, so that the fan units will not attract foreign material such as dust
or carpet fibers
Determine the location of:
– Power receptacles
– Air conditioning equipment, placement of grilles, and controls
– File cabinets, desks, and other office equipment
– Room emergency power-off controls
– All entrances, exits, windows, columns, and pillars
– Fire control systems
Check access routes for potential clearance problems through doorways and passage
ways, around corners, and in elevators for racks and additional hardware that will require
Store all flammable spare materials in properly designed and protected areas.
To be sure that you have enough space for the racks, create a floor plan before installing the
racks. You might need to prepare and analyze several layouts before choosing the final plan.
If you are installing the racks in two or more stages, prepare a separate layout for each stage.
The following considerations apply when you make a layout:
The flow of work and personnel within the area
Operator access to units, as required
If the rack is on a raised floor, determine:
– The need for adequate cooling and ventilation
If the rack is not on a raised floor, determine:
– The maximum cable lengths
– The need for cable guards, ramps, and so on to protect equipment and personnel
Location of any planned safety equipment
Review the final layout to ensure that cable lengths are not too long and that the racks have
Allow at least 76 cm (30 in.) of clearance in front of the controller-drive tray and 61 cm (24 in.)
behind the controller-drive tray for service clearance, ventilation, and heat dissipation.