I have a tablet that I'm doing some hacky work on. This tablet comes from the factory with a small storage partition called USERDATA, that's about 5gb. It also comes with a large storage partition called SDCARD, which is about 20gb. The 20gb partition is USB plug and play, and as soon as the tablet is pugged in, I can access it with RW permissions on a PC.
I need to flash the system partition with a modded system partition, which I have done successfully. The problem is, for some reason the modded system partition doesn't automatically mount the SDCARD partition. I'm able to mount it using the typical:
mount -o rw /dev/block/...
This works, but I no longer can access this partition on the PC over USB.
Based on the little bit of stuff I've found that seems related, it seems that there's a way to configure a daemon process that enables MTP for specific partitions.. But I can't find anything that explains how to go about it.
Any insight on how to mount a partition that allows USB access would be greatly appreciated.