cannot find the hard disk
MPN: AAEON: UPS-APLP4-A10-08128
Part description: SINGLE BOARD COMPUTER UP^2 (128GB)
Part S/N: C18623921
Failure symptom: cannot find the hard disk frequently
we installed UEFI and eMMC showed up at boot menu in BIOS in the beginning.
But when we re-boot, it doesn’t show. Then when we enter BIOS, we cannot find the previous UEFI bootmgr.
eMMC shows up occasionally but not always.