Mount internal flash when booted from SD-Card

I have a PFC 750-8204 controller. Because there is an issue with the controller I am booting from an sd-card. After the boot I want to access the internal flash drive. Is it possible to mount the flash or is there another way to access the flash drive when booted from an sd-card?

The pfc has fixed names, for disks and partitions. e.g.:
/dev/mmcblk1p7. Which is the internal memory’s main partition.
/dev/mmcblk0p2. Which is the SD card’s main partition.

Boot from SD card and login.
mkdir /mnt/internal
mount /dev/mmcblk1p7 /mnt/internal
ls /mnt/internal

Hello Edwin,

Thanks for the responce. I have tried your solution and this is the result:

The internal flash doesn’t seem to exist.