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Hardware

NVMe SSD disappears after warm reboot but returns after shutdown

troublesync_editorial
1mo ago
Performance
Environment

Environment

ASUS X670E motherboard with a PCIe 4.0 NVMe drive in the second M.2 slot.

What happens

What happens

A restart sometimes loses the data drive from BIOS, while a full power cycle restores it.

What I have tried

What I have tried

Updated the SSD firmware and checked drive health, which reports no errors.

I would appreciate advice on how to identify the root cause without risking existing data or configuration.

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1 reply
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elincode Answer
user
Posted 2w ago • 0 confirmations

The logs and behaviour point in the same direction here.

Likely cause: The motherboard firmware does not correctly reset the secondary M.2 controller on warm boot.

What I would try: Update UEFI, disable PCIe link-state power saving for testing and manually set the affected slot to PCIe Gen 4.

Document the original value before changing it and restore it if the symptom remains.

ellielectron
user
Posted 2w ago

I had not considered that component. I will verify its state before replacing any hardware.

Showing 1 of 1 community responses
AI DIAGNOSTICS

Incident analysis

Updated 1mo ago• Trouble ID

Most likely causes

The motherboard firmware does not correctly reset the secondary M.2 controller on warm boot. 83%
A recent software, firmware or configuration change is exposing an existing compatibility issue. 39%

Summary

The reported behaviour is consistent with the motherboard firmware does not correctly reset the secondary M.2 controller on warm boot. The safest next step is to verify that hypothesis with a reversible test before making permanent configuration changes.

Suggested Fixes

Verify the likely cause
Update UEFI, disable PCIe link-state power saving for testing and manually set the affected slot to PCIe Gen 4.
Validate and monitor
Reproduce the issue once after the change, review relevant logs or metrics, and keep a rollback path until the system has remained stable.

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