Detailed Information: http://trac.gateworks.com/wiki/linux/ubi
simulate a NAND device
modprobe nandsim first_id_byte=0x2c second_id_byte=0xac third_id_byte=0x90 fourth_id_byte=0x15
check if the device is set up
cat /proc/mtd
clean the device
flash_erase /dev/mtd0 0 0
format and flash
ubiformat /dev/mtd0 -f image.ubi -O 2048
attach device
modprobe ubi
ubiattach -p /dev/mtd0 -O 2048
and now mount the device - mind you have to replace the X with 0,1,2...
mount -t ubifs /dev/ubi0_X /mnt/ubifs