v Where rack cabinets are in rows, each rack cabinet must touch the rack cabinet
that is next to it. This reduces the amount of hot air that can flow around from the
back of the rack into the intakes of the storage subsystems that are in that rack
cabinet. You should use Suite Attach Kits to completely seal any gaps that
remain between the rack cabinets. For details about Suite Attach Kits, contact
your marketing representative.
v Where rack cabinets are in rows front-to-front or back-to-back, a gap of at least
1220 mm (48 in.) must separate the rows across the cold aisle.
v To ensure correct airflow in each rack cabinet, the rack filler plates must be
installed in unused positions. Also, all the gaps in the front of the rack cabinets
must be sealed, including the gaps between the storage subsystems.
Preparing for installation
Before installing the DS4800 Storage Subsystem, create a detailed plan of how this
unit will be used in your storage configuration. The plan should include determining
RAID levels, failover requirements, operating systems to be used, and total storage
capacity requirements.
Complete the following steps to prepare the DS4800 for installation into a rack
cabinet:
1. Prepare the site to meet all area, environmental, power, and site requirements.
For more information, see “Specifications” on page 21.
2. Move the shipping box that contains the DS4800 to the site.
Attention: The DS4800 shipping box weighs up to 53.8 kg (118.4 lb).
Cold aisle
Air
conditioner
Hot aisle
back
front
back
back
front
Airflow
front
2440 mm between
center lines of hot
and cold aisle
Perforated tiles
or gratings
1220 mm cold
aisle width
T42 racks
T42 racks
T42 racks
f10ug001
Figure 11. Example of cold aisle/hot aisle rack cabinet configuration
30 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide
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