My Wii U had a bad emmc. I found out about it almost 2 years ago, when I tried to homebrew this console. My first attempt on saving it was just to erase an build up the mlc, since the data on this console was not so important. This did not work, right there were some problems and I just tried to reinstall Isfshax. This did brick my console completely. There wasn't a screen output anymore so I left it in my shelf until last week. I engaged the Problem and did a defuse together with a nand-aid. Both worked surprisingly well. Now I am stuck, the nand-aid works, a installed sd card gets erased properly. My problem now is the rebuild of the mlc. I have a 256gb sandisk micro sd card from my switch, in the nand-aid. With this, the mlc build up goes infinitely long, the led blinks blue now for almost 10 hours. I tried bevor that a 32gb lexar card out of my 3d printer. With this I had the light blinking orange. I saw this topic in another post but with no conclusion. Is there anything I can do? Otherwise I am going to try a Rednand, which I really don't want to do because of my work and effort with the soldering. And i really appreciate your work for doing these tutorials, imagine how many consoles have been reviewed with your vids.
If you plan on using a 256GB SD Card inside the NAND-AID you have to make sure you put wafel_unlimit_mlc.ipx in the wiiu/ios_plugins folder and then rebuild the MLC. Additionally the console will permanently require this file and you will have to use defuse or ISFShax to boot the console every time.
Did you check to make sure the file is where it needs to be? Does the console erase the MLC successfully? Dump the logs and post them using a zip file and lets see if anything is being logged. What brand/model is this SD Card?
all files are where they belong. i made that sure many times and downloaded the files for the wafel_install multiple times too.I post a ZIP with my hole sd card so you could check if you want. I tried using the wafel_unlimit_mlc.ipx with the 256gb sd card but when another .ipx file was in the ios_plugins directory the wii u led didn´t even start to blink and stayed purple. at first i used a 32gb lexar sd card wich behaved the same. on the gbatemp posts wich cover the nand-aid topic there is a sandisk max endurance sd card recomended, wich i bought, so i would focus on this one.
this card behaved also the same. i erase the mlc, delete scfm.img, start the 3rd option on the first menu. then there are two posible outcomes. one is the blue blinking forever, this happens when i add the slc files additionally to the mlc files, in the wafel_install directory. and second there is a blue blinking at first then it blinks two times orange, then stays orange für 5 seconds and blinks orange again forever. this is when i don´t put the slc files in the wafel_install directory.
I tried a rednand on my 32gb lexar sd card yesterday wich to my suprise did work so i saw a wii u boot logo and came in the menu and everything. But this is not what really want.
In the attached zip file, i will put my hole sd card, with the logs and two additional text files wich are the wafel_setup_mlc log. i named them "wafel_setup_mlc nand-aid failed" and "wafel_setup_mlc radnand finished" the first is with the sandisk endurance and the second with the lexar as a radnand.the failed log looks every try the same just so you know.
If you find something please share me your ideas, i am rather helpless right now.
PS: I don´t send the wafel_install folder, because it´s too big and i know it´s correct because of the rednand try
Your SD Card appears to be properly setup. I don't think that is where the problem is located. That being said the most current log on the system is log 48. However that log file shows the MLC as 64GB and then shows that there is data corruption on the MLC.
If you properly erased the MLC there should be no data on it at all, so the data corruption error wouldn't exist in the log file. Additionally these log files should be wiped with it and started fresh, but your log files contain 99 and have wrapped around.
I suspect that these are old log files.
Lets start with a single question, what SD Card do you have installed in the NAND-AID?
The SanDisk Max endurance 32gb and I have never had a 64GB sd card, I wonder where this is coming from. https://amzn.eu/d/01XiPWis
I do have old log files from august 2024 when I first tried to revive my Wii U, maybe there is something that helps. I will send them later when I am at home.
Interesting problem. That SD card is perfectly fine. I have used them many times. Lets do a test, remove the SD Card from the NAND-AID, then I want you to go into the minute menu and erase the MLC. Let me know what happens.
Here are my logs fro 1,5 years ago.
And i put some photos in the other ZIP in wich you can see how the wii u detects my sd card plus a photo od my nand-aid soldering.
In there is a photo of erasing the mlc with and without sd card.
Pictures all look fine. SD Card is properly detected in NAND-AID and is successfully erased. I don't see anything wrong here.
The logs you initially posted appear to be older, they are dated 2016. Additionally I went through more of them and I can see where the homebrew installation failed, so that confirms they are before you did the NAND-AID repair. The 2nd set of logs you posted are short and appear to have been created after the MLC was erased. They are dated April 10th 2026. Nothing stands out in them at all as to what is going wrong.
Lets do this, try to rebuild the MLC again, and then dump the logs again and post them
here are the fresh logs. In log 4 you can see the attemt of the 9th april and all the way down are all titels, wich the wii u tryed to install, wich all had an eror. so my assumption is that every single titel fails to install while the nand-aid rebuild. when you look at the wafel_setup_mlc log there is the installinfo of a titel and under it is the install, wich in my case ends always with fffbf3b5. But in the log of my successfull rednand rebuild there are 00000000 at the end of the install line.
example:
Nand-aid
OpenDir /vol/sdcard/wafel_install: 0
OpenMCP /vol/sdcard/wafel_install: 0
InstallInfo 0005001010040200: 00000000
Install 0005001010040200: fffcffe5
Rednand
OpenDir /vol/sdcard/wafel_install: 0
OpenMCP /vol/sdcard/wafel_install: 0
InstallInfo 0005001010040200: 00000000
Install 0005001010040200: 00000000
I just want to mention you have had a very similar problem with a wii u https://www.tzirf.com/nintendo-consoles-handhelds/wii-u-nand-aid-repair-that-took-4-days-to-rebuild-the-mlc/ the only difference i can see is, that my light turns orange after it stops proceeding and yours did go on with blue.
When i try not only to rebuild the mlc but the slc with it, the same happens with my light so then it stayes blinking blue forever. in the wafel_setup_mlc log you could see then that it stoped while rebuilding the slc titels and doesen´t even make it to the mlc titels. Unfortenatlly you didn´t mention if you were only rebuilding the mlc titels or both and the post just stoped wich is why i posted my situation.
I had another idea that came in to my mind how to solve this. I don´t know exactly how, but couldn´t i rebuild the mlc via Rednand, then dump the mlc und flash it on my sd card wich goes then in to the nand-aid?
i just don´t know if thats possible because i never looked in to mlc recovery, since i did´t have much data on my wii u anyway and just erased it.
so far thanks for the help a don´t take it for gratet :)
Quotehere are the fresh logs. In log 4 you can see the attemt of the 9th april and all the way down are all titels, wich the wii u tryed to install, wich all had an eror. so my assumption is that every single titel fails to install while the nand-aid rebuild. when you look at the wafel_setup_mlc log there is the installinfo of a titel and under it is the install, wich in my case ends always with fffbf3b5. But in the log of my successfull rednand rebuild there are 00000000 at the end of the install line.
You are correct in your assumption. The value fffbf3b5 indicates the title failed to install.
Quote from: Idc on Apr 12, 2026, 05:44 PMI just want to mention you have had a very similar problem with a wii u https://www.tzirf.com/nintendo-consoles-handhelds/wii-u-nand-aid-repair-that-took-4-days-to-rebuild-the-mlc/ the only difference i can see is, that my light turns orange after it stops proceeding and yours did go on with blue.
When i try not only to rebuild the mlc but the slc with it, the same happens with my light so then it stayes blinking blue forever. in the wafel_setup_mlc log you could see then that it stoped while rebuilding the slc titels and doesen´t even make it to the mlc titels. Unfortenatlly you didn´t mention if you were only rebuilding the mlc titels or both and the post just stoped wich is why i posted my situation.
Yes I remember this console very well. The reason the posting stopped is because I never was able to resolve the issue and there was no indication of what was causing the extremely slow rebuild time that eventually would just stall during the process. As for your question, I always rebuilt with both MLC & SLC titles. It should be noted though that the SLC titles are typically only necessary if you are running old firmware on the Wii U. So you can remove those if you believe that is causing the problem and just do a rebuild using the MLC titles. Your console is on the latest firmware for your region: 5.5.5E.
Okay, so the logs are working, as the newest log file has changed to number 43. The log doesn't show anything that stands out unfortunately.
Have you looked at the defuse console while rebuilding to see what its outputting?
Edit: Sorry I assumed you installed defuse from the title of your post, but perhaps you didn't do all that soldering. Let me know if you did.
I did install a defuse, because after I erased the mlc and stupidly uninstalled isfshax the wii gave me no output anymore, back in august 24. But after reinstaling isfshax i cut the powerline to the pico and looked if the system would boot and give me an output, wich it did. So i cut the pico out, but left the cables (they are long enough to store the pico over the heat sink) and isolated them so they coundn´t make contact with something.
Might be something to consider reconnecting defuse and having a look at the console output while the rebuild is processing. I need to do more testing on the console I have that is exhibiting the same behavior. I don't have the ability to install defuse right now on it. Will have to wait, but I am hoping to be able to do that next month.
I will hook it up again, make a video and post it here as soon as posible.
I hooked it DeFuse up again.
i don´t post a video of putty i just put all the generatet text in to a .txt i think is is better.
ancast: failed to open plugin `sdmc:/wiiu/ios_plugins/wafel_core.ipx` for pre-parsing!
ancast: pre-parsing plugin `sdmc:/wiiu/ios_plugins/00core.ipx`
ancast: pre-parsing plugin `sdmc:/wiiu/ios_plugins/5debug.ipx`
ancast: pre-parsing plugin `sdmc:/wiiu/ios_plugins/5isfshax.ipx`
ancast: pre-parsing plugin `sdmc:/wiiu/ios_plugins/5payldr.ipx`
ancast: pre-]parsing plugin `sdmc:/wiiu/ios_plugins/wafel_setup_mlc.ipx`
ancast: failed to open plugin `sdmc:/wiiu/ios_plugins/wafel_core.ipx`!
You are missing wafel_core.ipx. Make sure its in on your SD Card in the correct directory. Also remove 00core.ipx. You don't need the core twice.
Main menu
Patch (slc) and boot IOS (slc)
Patch (sd) and boot IOS redNAND
Patch (sd) and boot IOS (slc)
> Patch (sd) and boot sdmc:/ios_orig.img <
Patch (sd) and boot sdmc:/ios_orig.img redNAND
Patch ISFShax and boot IOS (slc)
Boot 'ios.img'
Boot IOP firmware file
Boot PowerPC ELF file
Backup and Restore
Interactive debug console
PRSH tweaks
Display crash log
Clear crash log
Restart minute
Hardware reset
Power off
Credits
minute
Also the log shows that you selected "Patch (sd) and boot sdmc:/ios_orig.img" first and then selected "> Patch (sd) and boot IOS (slc) <" after. This isn't correct.
The steps should be go into backup and restore, select Erase MLC and then Delete scfm.img. After go back to the main menu and select "Patch (sd) and boot IOS (slc)". This will start the setup of the MLC.
The LED will become static once it finishes. If it does finish, power the Wii U off and post the wafel_setup_mlc.log or look at it and make sure that it deleted the wafel_setup_mlc.ipx from the /wiiu/ios_plugins folder on the SD.
Turn console back on and select " Patch (sd) and boot IOS (slc)" again and if everything is working the Wii U setup menu will launch.
The wafel_core.ipx is the same as 00core.ipx, I think on GitHub it is mentioned that it was just renamed to 00core.ipx. And I didn't find a place were you could download wafel_core.ipx, except for the defuse folder that is linked in you defuse video.
Referring to the 4th option, I think I didn't click on it and to confirm, even if I did, it would do nothing, I tried it and it just said something is missing and sends you back to the main minute menu. After that, I made the video filming my tv. If you're concerned about me pulling my sd card too early. After way over 30 times trying this mlc rebuild, I can say after the led turns to blinking orange nothing in the log changes anymore. Wich is the point in my second video were it only outputs ,,alive" again and again.
Else I tried to day, resoldering my nand-aid joints to the Mainboard (still all the same).
I rebricked my console to only work with defuse and reformatted my sd card to start all over again. Also I tried every version of the wafel_setup_mlc.ipx and every version of the 00core.ipx and the one wafel_core.ipx I had from you're files. Some other files too but I won't mention them all. I think I have done everything I could for over well over a week. I posted my situation under issues on git-hub, were the wafel_setup_mlc.ipx is posted. Maybe the dev knows something about this problem. I think he is German wich could help since I am German too.
https://drive.google.com/file/d/1lo7RuHfHG9BtXn_4mPPLuL-LPYECEGYE/view?usp=drive_link
https://drive.google.com/file/d/1ny8lwh41bCve1LPKvD93yfOAiIF_oW3m/view?usp=drive_link
I see the tools have been updated. My apologies. I haven't used the newer versions. You are correct wafel_core.ipx is 00core.ipx now.
That being said something isn't right here.... I shouldn't see it trying to load wafel_core.ipx and throwing an error. So I am curious if you mixed up different versions of the files.
Did you download and use the latest version of defuse? It can be downloaded here (https://github.com/StroopwafelCFW/wii_u_modchip/releases/tag/v1.1-zip-update)
If it weren't for the fact that you have defuse already installed. I would suggest and recommend not using it and just go the paid to beak (https://gbatemp.net/threads/how-to-use-paid-the-beak-wii-u-unbricking-without-soldering.673686/) method.
Either way though you need to make sure your not mixing older versions of the files with new ones, because that is going to cause problems.
The NAND-AID appears to be working. You showed that the MLC erased successfully with the SD Card installed in the NAND-AID. Also you tested it without an SD Card and found that it errors out which proves that the NAND-AID is properly detecting the SD Card installed in it. If you still think the issue is with the soldering job, post some high resolution pictures and I will do my best to inspect them to see if there is anything that stands out as a problem.
I saw your video, what did you do to the Wii U when the led on the console changed from blinking blue to blinking orange?
I do nothing to the wii u while its going to only blink orange. i just wanted to say that after this event there is nothing new written in to the wafelsetup_mlc log and the sd card can just be unplugged.
I again set my sd card up. this time i used the files from your link, the newest wafel_setup_mlc.ipx https://github.com/StroopwafelCFW/wafel_setup_mlc/releases and the newest isfshax from here https://github.com/isfshax/isfsh.ax . result? nothing the gets the same error codes every time.
could you maybe send me a zip file of an properly setup sd card?
I would just add the install_wafel folder and otp and give it a try
Lets check a few other things...
Do you have all the wireless modules connected?
Edit: I looked at your logs again, the console doesn't see the 5Ghz Module. Please make sure its connected securely. If it is and the same error is occurring than either the module is bad or the DRH is bad in the console. You can test this by using a known working one.
Yes they are connected and they work the Wii U gamepad starts up every time I try to rebuild the mlc. And as I did the successfull rednand try, I connected to WiFi and used my gamepad for that of course.
Post some pictures of your NAND-AID. We might as well have a second pair of eyes on it just to rule it out.
A couple things that come to mind, did you cut trace R26, which disables the eMMC?
Also lets make sure your SD Card in the NAND-AID is working. You can verify the Micro SD Card you installed in the NAND-AID is working by putting it in a computer and using h2testw (https://h2testw.org/).
since it doesen´t erase the mlc without an sd card´, wich it did before the nand-aid, i think r26 properly cut.
the sd card okay too.
I did my best to capture the soldering but since i don´t have anything to magnify my phone camera it´s not the best quality. Ignore the cut kabels this was just a try to connect a micro sd to sd card adapter, to see if the micro sd card port is falty, but it did as always nothing.
If you have no idea left i will do just a rednand and wait for someone else to have and solve this problem.
I really don´t have anything left i can think of whats causing this istallation problem
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You have an iPhone, try taking a picture zoomed out and just take it of the entire NAND-AID. The picture will offer better detail than trying to get close up shots.
If you measure for ground on the NAND-AID with a multi-meter what are you reading for ohms?
Those are my readings in Ohms:
Ground 0
Clk 0,3
Cmd 13k
D3 2,5M
D0 2,5M
D1 2,5M
D2 2,5M
3v 1,2K
Thanks for taking measurements. With a ground measure of 0 ohms, we know you have a good ground on the NAND-AID. So I don't think there is any issue with the NAND-AID based on all the information you provided and testing you have done. It looks to be functioning properly. I am not sure why the rebuild of the MLC suddenly stops.
The fact that a redNAND is working for you should indicate that the files used to rebuild the MLC are working properly. I have a console with the same issue you are experiencing. A redNAND works on the console, but I am unable to get the NAND-AID to rebuild the MLC. That being said I didn't install Defuse or try Pay the Beak on the console to further diagnose it. I don't currently have access to it for testing. I should be able to get it towards the end of the week to take another look at it and see if I can figure out what the problem could be. I will post back my findings if I am able to identify the problem and repair it.
okay so far thank you for everything. remember it doesen´t even install one titel it just stops trying after a few.
I will keep the alert for this topic activ and i am excited for you findings, good luck!
Can you do one more test for me? I want to compare 2 sets of log files to see if the rebuild fails at the same point every time.
I need you to do the following 2 times:
Can you Erase the MLC, Delete the scfm.img and then try to rebuild the MLC. For matter of consistency with the log files I would recommend setting a timer for 5 minutes and then unplugging the console and dumping the log files.
Please keep the log files separated for each rebuild attempt so that I can compare them accurately.
The Wafel_setup_mlc log or the system log?
If you want the first one, i can really confirm that the process always stops at the same title, if you don´t change the sd kart setup. If you do so it stops at different titles, but i thinks thats just because it starts with a different title so the order changed. i put all i keept in the zip with different rednand trys the order changed too but this didn´t had an effect.
If you mean the system log i would say in every system log i sent there musst be multiple trys with the same outcome since i tried it over and over and over and over again.
Quote from: Idc on Apr 20, 2026, 06:03 PMThe Wafel_setup_mlc log or the system log?
The System logs. They are updating when you try to rebuild (we already confirmed that), so it allows me to track and find the newest log.