[Q] Tab stuck on boot logo. topic

Hi guys
at first, sorry for my bad english, i'll try to explain my problem clear as possible.

I was triyng to install CM12 port but i've format data instead simply wipe.
Now, i've try to install .zip from SD but TWRP can't mount System.
Try with Odin to install stock rom but also failed.
Now, the only two things that i can do are boot in Download Mode or in Recovery.
Any help or idea?

Thank you All for you help.

Cheers.