sd card intern mod "can't init file system"

[lolof]

Hello,

My sd card mod (internal) was working fine several days, but now when dreamshell is loading i get "can't init sd file system".
I checked all and tryied with another sd card without success!
I do not know what to try to get the sd card reader work again.

Edit : some times works, some times not... But when it works, it works very well until i reboot.
Seems really to be a problem with initialization. Which line from the serial dc does the initialization on the sd card ?

Thanks