You need to take us through what you did step by step.
Is your SD Card formatted to FAT32?
What files and folders do you have on the SD Card?
Nothing in the hack should affect your Disk Drive as you are running an exploit from the web browser only.
Ok. first things first, i use an sd card for both my hacked wii, and my hacked 3ds, so if that is the problem then woops. ok so first i downloaded the homebrew channel, loadliine and a cheating software(forgot the name, all i remember is that the icon has doctor mario).
i then made a folder called wiiu(ether that or came with homebrew) and put all of the apps that i listed on the sd card(the one that i mentioned. the size is 4 gigs if you're wondering).
After that i put the sd card in the wiiu, ran browser, then went to wiiubru. when i got to the site, a video came up then the console froze
I waited a bit and because nothing was happening, i restared my console. after that, the game i had in the wiiu (Smash) reade as an invalid disk.(it was working fine befor this.)
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If more info is needed, i tryed MK8 after and it worked fine but wouldn't update (dns) so i started it, quit it, went to settings to turn dns off, then when i went back it read as an invalid disk too. and then all other disks continued (except for wii games)