Lenovo P1 Gen 4 Bios

If you use a ThinkPad Thunderbolt 4 Dock:

By default, Lenovo sets Thunderbolt security to "User Authorization." This means every new Thunderbolt device (dock, eGPU, SSD) will ask for approval. lenovo p1 gen 4 bios

Symptom: "Boot Device Not Found." Solution: Enter BIOS > Config > Storage > VMD Controller. Set to Disabled. The Intel Volume Management Device (VMD) driver is required for RAID, but it hides NVMe drives from legacy bootloaders. Disabling VMD reveals the drive. If you use a ThinkPad Thunderbolt 4 Dock: