ATTO Technology Diamond Storage Array S-Class - Manual (Page 91)

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Monitors, reports
The Diamond Storage Array will function under
normal external operating temperatures of 5°C
and 40°C. Temperature sensors provide data to
the software to trip a temperature warning alarm
and will, at excessively high or low temperatures,
disable disk drive activity to protect the drives.
The Diamond reports the temperature via SES,
CLI and the ExpressNAV interface as well as the
state of the temperature warning alarm (N
ot
Present, OK, Warning, Critical ). The temperature
warning alarm will report OK during normal
operating conditions.
In an abnormal operating condition, such as
blower failure, under high ambient temperatures
when the Diamond internal midplane temperature
reaches 47°C, the temperature alarm will report
Warning and activate the audible alarm and fault
LED on the front of the unit. If the internal
midplane temperature were to reach 52°C, the
temperature warming alarm will report
Critical , the
array will be taken off line, and all disk drive
activity will be disabled. The exact external
ambient conditions which the Array will be taken
off line depends on data activity, but will occur
between 38 and 42°C.
Power supply monitoring
The Diamond Storage Array monitors the
operation of its power supplies and blower
assemblies every 30 seconds. If the status
changes, the system reports it visually with an
LED and a message in the CLI.
If a power supply or blower fails, the management
system sends a CLI message and turns off the
corresponding power supply LED.
The blower assembly directly adjacent a power
supply must be functioning properly for the power
supply to work properly. If a blower assembly
fails, the power supply will shut down and the
management system will send a CLI message.
The corresponding power supply LED on the
system management card will also turn off.
If a good replacement power supply or blower
assembly is inserted into the array, the
management system will send a CLI message and
the corresponding system management card LED
will go on. It may take up to 30 seconds for the
system to note these changes.
System fault LED and error codes
If a serious hardware or software error occurs in
the Diamond Storage Array, the System Fault
LED will display a series of flashes or blink
codes. Error information will be reported via the
Command Line Interface if it is operational.
At power up, the green Diamond Array Ready
(RDY) LED turns on after successful completion
of the POST (Power On Self Test) indicating the
array is available for normal operation.
During operation, the Ready LED will stay lit
even if the amber Fault (FLT) LED lights.
If a serious error occurs in the array, the amber
Fault LED will flash repeatedly in a blink code
pattern
• an initial series of blinks indicating the system
problem
Exhibit 10.0-1 Typical Diamond Storage Array operation over a range of external ambient temperatures. Alarms
will be audible, visual, CLI and SES cues as described above.
Temperature
Condition
25°C
blowers OK
25°C
1 blower fails
32°C
blowers OK
32°C
1 blower fails
35°C
blowers OK
35°C
1 blower fails
40°C
blowers OK
40°C
1 blower fails
Read/Writes normal normal normal normal normal normal normal Array offline
Alarms OK OK OK OK OK WARNING OK CRITICAL