Checking Fan Components; Checking The Switch Temperature - Brocade Communications Systems A7533A - Brocade 4Gb SAN Switch Base Troubleshooting Manual

Symptom I2C bus errors are appearing in the switch log.
Probable cause and recommended action
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I C bus errors generally indicate defective hardware or poorly seated devices or blades; the specific
item is listed in the error message. See the Fabric OS Message Reference for information specific
to the error that was received. Some Chip-Port (CPT) and Environmental Monitor (EM) messages
contain I
If the I
hardware, as this is the most likely cause. The next sections provide procedures for debugging the
hardware.
Symptom Core file or FFDC warning messages appear on the serial console or in the system log.
Probable cause and recommended action
Issue the supportSave command. The messages can be dismissed by issuing the supportSave -R
command after all data is confirmed to be collected properly.
Error example:
*** CORE FILES WARNING (10/22/08 - 05:00:01 ) ***
3416 KBytes in 1 file(s)
use "supportsave" command to upload

Checking fan components

1. Log in to the switch as user.
2. Enter the fanShow command.
3. Check the fan status and speed output.

Checking the switch temperature

1. Log in to the switch as user.
2. Enter the tempShow command.
3. Check the temperature output.
Fabric OS Troubleshooting and Diagnostics Guide
53-1001187-01
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C-related information.
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C message does not indicate the specific hardware that may be failing, begin debugging the
OK Fan is functioning correctly.
absent Fan is not present.
below minimum Fan is present but rotating too slowly or stopped.
above minimum Fan is rotating too quickly.
unknown Unknown fan unit installed.
faulty Fan has exceeded hardware tolerance and has stopped. In this case, the last known
fan speed is displayed.
The output from this command varies depending on switch type and number of fans present.
Refer to the appropriate hardware reference manual for details regarding the fan status. You
may first consider re-seating the fan (unplug it and plug it back in).
Refer to the hardware reference manual for your switch to determine the normal temperature
range.
Switch message logs
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