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4-9
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
OL-9285-05
Chapter 4 Troubleshooting Hardware
Troubleshooting Fan Issues
Troubleshooting a Fan Failure Using Device Manager
To troubleshoot a fan module problem using Device Manager, follow these steps:
Step 1 Choose Physical > Fan. You see the Fan Status dialog box.
Step 2 If the OperStatus is failure, one or more fans are not operational. Replace the failed fan module before
your switch overheats. You should see the following system message in the switch log:
Error Message PLATFORM-1-CASA_FAN_FAIL: Fan module [dec] Failed.
Explanation
Fan module failed and needs to be replaced. This can lead to overheating and
temperature alarms.
Recommended Action Enter the show platform internal info command or similar Fabric
Manager/Device Manager command to collect more information.
Step 3 If the OperStatus is absent, the fan module has been removed. As soon as the fan module is removed, Cisco
SAN-OS starts a five-minute countdown.
Caution If the fan module is not reinserted within five minutes, the entire switch is shutdown.
Software reads a byte on the SEEPROM to determine if the fan module is present. If the fan module is
partially inserted or if software is unable to access the SEEPROM on the fan module for any other reason,
then Cisco SAN-OS cannot distinguish this case from a real fan module removal. The switch will be shut
down in five minutes. The following priority 0 syslog messages are printed every five seconds:
Error Message PLATFORM-0-FAIL_REMOVED: Fan module removed. Fan module has been
absent for [dec] seconds.
Explanation
Fan module was removed. This could lead to temperature alarms.
Recommended Action Replace the fan module immediately.
Step 4 Remove and reinstall or replace the fan module. If the Fan LED is still red, the system detects a fan
module failure. Contact your customer service representative for instructions.
Note If you purchased Cisco support through a Cisco reseller, contact the reseller directly. If you
purchased support directly from Cisco, contact Cisco Technical Support at this URL:
http://www.cisco.com/warp/public/687/Directory/DirTAC.shtm
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