![]() The current write policy of the RAID array is Write Back, that is, data is written to the cache and then to the disk. The model of the RAID controller card is SAS3108, and the cache size is 2048 KB. Check the records related to the RAID controller card on the OS logs.The hardware structure provided by the CH242 V3 DDR4 Compute Node User Guide shows that the red indicator is located on the RAID controller card.As a result, the CPU reports an uncorrectable error and the OS does not respond. Therefore, the OS will upgrade the CPU microcode version during startup. The microcode version integrated in the OS is higher than that integrated in the BIOS. The microcode version integrated in the BIOS (3.63) is 0x0b000020, and the microcode version integrated in Oracle Linux 7.4 is 0x0b000021. ![]() The following figure shows the microcode defect information. When the microcode version of the CPU is earlier than 0x0b000021, the OS does not respond when the CPU microcode is upgraded. Therefore, check that the OS is compatible with the CPU and that the CPU does not have known defects such as an incompatible microcode version. ![]() If the hardware is faulty, the fault cannot be rectified. Restarting the boards can rectify the fault. In addition, the boards do not respond each time when the OS is being loaded. The same problem occurs on all boards with the same configuration onsite, and boards with other configurations work properly.
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