UCS Mini 5108 + FI 6323 (UCS Manager 4.0.1) FAN ISSUE

[djibrilcamara]

Dear Cisco Community,

I have an Cisco UCS Mini 5108 + FI6324  (UCS Manager 4.0.1) platform working well but since yesterday I receive major faults on the FANs while they are working well. Below the message that I receive only from the 4 FANs located in Fabric Interconnect A.

"Fan module 1-5 in chassis 1 operability: inoperable"

I also receive a critical fault in Chassis. below the message that I receive

"Thermal condition on chassis 1 is upper-non-recoverable"

Finally the chassis FANs are making a lot of noise while the server room has a very good thermal (arroud 16°C).

Does anyone already had this issue.

Many thanks for your help.

[Kirk J · Accepted solution]

Greetings.

It generally sounds like the I2C bus may be having some communications issues.

There were a few previous bugs where the fan control mechanism was prematurely timing out if the IOM didn't get an immediate fan response (or got a partial/incomplete response).  This results in the Fans temporarily being marked inoperable, the fans go into safe mode (100% speed), and generic chassis thermal alerts.

TAC needs to take a look at the Chassis logs.

Thanks,

Kirk...