Grading Checklist

• Checked lspci output to confirm whether the device is visible on the PCIe bus
• Reviewed dmesg for PCIe enumeration errors, AER messages, or NVMe driver failures
• Verified NVMe kernel modules are loaded (lsmod | grep nvme)
• Checked BMC/iDRAC system event log for hardware fault entries
• Considered physical layer issues: drive seating, riser card, PCIe slot failure
• Investigated whether BIOS/firmware changes during the patch window affected PCIe bifurcation or slot enablement settings
• Proposed a physical reseat of the drive as a diagnostic step
• Identified the need to test the slot with another device or the drive in another slot to isolate the fault
• Addressed the application impact (degraded database cluster) and any immediate mitigation
• Mentioned checking NVMe drive health via nvme smart-log if the drive becomes visible again
• Considered thermal or power delivery issues as potential causes
• Documented the resolution path and whether a drive RMA is needed