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ALM-0x28000005 CPU QPI/UPI Connection Failed (Cable, Major Alarm)
Description
Alarm message:
CPU arg1 QPI/UPI arg2 link failed.
This alarm is generated when the QuickPath Interconnect (QPI/UPI) bus is faulty.
Alarm object: cable
Possible Causes
- The CPU is in poor contact with its socket.
- The mainboard is faulty.
- The CPU is faulty.
Procedure
- Gracefully power off the server.
- Remove the CPU indicated in the alarm message, and check whether the CPU socket has twisted pins.
- Check whether the CPU is faulty.
The following is an example of clearing the alarm:
Cable / Interconnect (CPU1 QPI/UPI Link)
- Switch CPU 1 with a functioning CPU.
- Power on the server. If the alarm is still generated for this CPU, the CPU is faulty. Otherwise, the QPI/UPI link on the mainboard is faulty.
- Gracefully power off the server, replace the faulty CPU, and power on the server again. Then, check whether the alarm is cleared.
If yes, no further action is required.
If no, go to 6.
- Gracefully power off the server, replace the mainboard, and power on the server again. Then, check whether the alarm is cleared.
If yes, no further action is required.
If no, go to 6.
- Contact technical support.
