Default My ASUS Transfrmer TF300T tab is dead

Hello friends, I bought the ASUS Transformer Pad 300T and just a week later I had the great idea of instal TWRP for installing my appreciate CM11, but when I installed TWRP and I was abut to install the CM11, I see:

E:Unable to mount '/data' (tw_mount)
E:failed to mount /data (no such file or directory)

When I saw that messages I entered in panic and I wiped all
I'm afraid I'll have to send it to repair, and the fill will hurt. So I hope somebody help me. I'll upload a photo soon.
Thanks.