Invalid argument, E: Unable to mount '/system , '/cache , '/data and storage

Hello everybody,

I think only an expert can help me !
LG G3 is ater few minute to fastboot mode.
1- no download mode, only fastboot.
2- the system, data, cache is in read only, cannot remount with rw permission, get error messege:
Invalid argument and E: Unable to mount '/system , '/cache , '/data and storage.
cannot flash via fastboot or adb.

when I run:
1- dmesg | grep mmc0 i get i/o error about logical block 0,1,2 and 3, buffer i/o error.
2- fsck_msdos dmesg I get i/o error.
some how it can install via srk tool 2.1 twrp recovery and I try to repair the system or format or change partitin type with twrp.
:eek:

E:failed to mount /efs (Invalid argument) n910h

Hello everyone
When I made a backup of my system ( 5.1.1 ) It took a long time ( 2.5 Hour ) :confused:
after that i try to turn it on but its keep Restarting and then i install stock firmware ( 5.1.1 ) but it keep Restarting
in recovarymod i see that ( E:failed to mount /efs (Invalid argument) )
also i install 4 file firmware ( 4.4.4 ) but didn't work :(
so any one can help me please ?? :crying::crying::crying: