IBM 9835-415, Deployment Manual

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Table 11. Airflow requirements
Storage configuration
Cubic feet per minute (CFM)
Nominal temperature
(23°C) (73.4°F)
Maximum
temperature
(35°C) (95°F)
4 grid controllers and 2 flash enclosures 530 970
6 grid controllers and 3 flash enclosures 730 1330
8 grid controllers and 4 flash enclosures 940 1680
10 grid controllers and 5 flash enclosures 1140 2030
12 grid controllers and 6 flash enclosures 1340 2390
Temperature threshold and events
The storage system handles overheating by informing the administrator through
warning events and initiating an automatic thermal shutdown as a last resort.
Note:
v These event notifications indicate to the administrators if the system temperature
is: normal, high, too high, and critically high; above which shutdown will be
applied immediately. Table 12 depicts the temperature thresholds and events
received.
v After a manual or automatic thermal shutdown due to thermal conditions, IBM
support must be immediately contacted. Do not attempt to power up the system
before contacting IBM support.
Table 12. FlashSystem A9000R system temperature thresholds and events
Temperature
threshold
Event Description
27°C (80°F) SYSTEM_TEMPERATURE_IS_OK_NOW No action required. This event is
generated only when the normal
system temperature is recovered from a
higher temperature.
30°C (86°F) SYSTEM_TEMPERATURE_IS_HIGH System should be closely monitored,
and action to cool down the system is
recommended.
32°C (89.6°F) SYSTEM_TEMPERATURE_IS_TOO_HIGH Actions to cool down the system must
be taken immediately.
35°C (95°F) SYSTEM_TEMPERATURE_IS_CRITICALLY_HIGH Manually shutdown the system by
using the
shutdown command.
38°C (100.4°F) SYSTEM_TEMPERATURE_IS_CRITICALLY_HIGH_
SHUTTING_DOWN
If automatic shutdown is enabled:
automatic system shutdown is in
progress.
Contamination information
You must consider the air quality and contamination levels at your installation site.
Airborne particulates (including metal flakes or particles) and reactive gases acting
alone or in combination with other environmental factors, such as humidity or
temperature, might pose a risk to the FlashSystem A9000R system hardware. Risks
that are posed by the presence of excessive particulate levels or concentrations of
Chapter 4. Physical installation site requirements
35