The sdcard is already fat32. The problem is with the recovery (twrp 2.7.1.0) provided in the boot.img (previously renamed zImage and putted on the sdcard) on the main page ("new kernel 310mb") that can't mount /external_sd. I get this error messages coming from a fresh install :
Code:E:Unable to find partition size for '/boot' E:Unable to find partition size for '/recovery' E:Unable to recreate and-sec folder. E:Unable to mount storage. E:Unable to mount /external_sd during GUI start up. E:Unable to mount /external_sd/TWRP/.twrps when trying to read settings file.
I tried with twrp 2.8.4.0 recovery equipped with omni 5.0 and successful mounted all partitions, but quickly after installed LionDroid (3.1) the /data and /sdcard partitions become inaccessible. Should I have to use a specific kernel or bootfiles/fota in order to successfully flash the rom with its partition scheme?
copy rom in internal memory and flash it from there