IBM 9835-415, Deployment Manual

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2. Install perforated tiles in the front and back of each base rack and expansion
rack as follows:
a.
For a stand-alone base rack, install two fully perforated tiles in front of the
base rack and one partially perforated tile at the back of the base rack.
b. For a row of racks, install a row of perforated tiles in front of the racks and
one or two fully perforated tiles at the back of each two racks.
c. For groupings of racks, where a hot aisle and cold aisle layout is used, use a
cold aisle row of perforated tiles in front of all racks. For hot aisles, install a
perforated tile per pair of racks.
For more information, see “Preparing for non-raised-floor installation and
cabling” on page 25.
3. Consider using the rear-door heat exchanger (feature code AFR1) to reduce the
temperature of the air that leaves the rack.
The rear-door heat exchanger is a water-cooled door that is designed to remove
heat that is generated from the rack before it enters the computer room. The
door uses standard fittings and couplings. The door removes up to 50,000 BTUs
of heat, which is approximately 15 kW, from the air that exits a rack that is full
of servers.
The rear-door heat exchanger can increase server density without increasing
cooling requirements, making the option a more cost-effective solution than
adding an air-conditioning unit. This door is an effective solution for a data
center at the limit of its cooling capacity, but that still has usable floor space to
add racks. The rear-door heat exchanger is also an efficient way to deal with
computer room hotspots.
For more information, see “Rear-door heat exchanger” on page 15.
4.
Ensure that the installation site meets the cooling (thermal dissipation)
requirements that are listed in Table 10.
To support future scale-out capability (MES) upgrades, the installation site must
provide cooling arrangements to support a full rack configuration.
Table 10. Thermal dissipation for FlashSystem A9000R system
Storage configuration Thermal Dissipation
kBTU/hour
4 grid controllers and 2 flash enclosures 16.4
6 grid controllers and 3 flash enclosures 24.14
8 grid controllers and 4 flash enclosures 31.96
10 grid controllers and 5 flash enclosures 39.6
12 grid controllers and 6 flash enclosures 47.3
5. Ensure that the installation site meets the airflow requirements that are listed in
Table 11 on page 35.
To support future scale-out capability (MES) upgrades, the installation site must
provide sufficient air flow to support a full rack configuration.
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IBM FlashSystem A9000R Models 9835-415 and 9837-415 Deployment Guide