Failed to mount CTRNAND after trying to unbrick 3ds.

So to confirm a few things. You did successfully mod the system? (Install B9S)
What files did you delete?
What do you mean recover and how did you do this?
Do you have LumaCFW?

 

First. Do you have any nand backup? If so, restore it with Godmode9.

If not, do CTRTransfer via Godmode9. If that won't work use Decrypt9. If that won't work use Lazarus 3d.

 

https://github.com/AuroraWright/Luma3DS/releases

download the 7z file
and place the boot.firm located inside the 7z on the root of your SD card

 

You shouldn't get that blue screen error if you removed the Luma or borked up the Nintendo 3DS/Private folders.
If you deleted the files and recovered them with Recuva then they are as good a gone.
The Nintendo 3DS folder and the Private folder inside consist of just games, apps and saved games. Nothing to cry over much.
Here is the big question.. Did you restore the recovered sysnand.bin from Recuva?
If yes, I hope you made a copy of it to your PC at one point, if not, do as Hunter says and put the latest Luma boot.firm on the SD card root for now and put the godmode9 payload in the Luma/Payloads folder
for now (make the folders if they don't exist) and remove the everything else. You should only have the boot.firm and Luma folder.
Try to get into GM9 and post back.

As for the CTRTransfer we will talk about it later if needed.
I also provide voice chat support over discord if you need it, time permitting.

 

If you didn't delete the Nintendo 3DS folder and private folder don't, it's not needed. I assumed you also recovered it.
Make sure you can boot into godmod9 by holding start when powering on, if you have more then one payload in the luma/payloads a menu will come up and select godmode9.
You should at this point make a backup of the SD card just in case.
The sysnand.bin you recovered might have been corrupt and that why the system is how it is now.
As per my last post, at any time during the modding did you copy the SysNAND.bin to you PC?
If you want to try a program I use at work look up Active @ File Recovery. It has a way to look for files recuva doesn't. I did a test for a member sometime ago for something similar to your situation.
Long story short I copied 4 NAND backups to a SD card, erased them and recovered 3 of 4 successfully. I don't know if you know about flash memory technology but in short if you didn't write too much data to the SD card their might be a change to get a working copy back, long shot if you are using the stock 4GB SD card.
The program is not free but if you know where you can get things for free, look up Active @ Data Studio 10.5.
I can guide you through the recovery process.

If you don't want to try recovering the data again follow this guide.
In essence you are reinstalling the system files back.

https://3ds.guide/ctrtransfer

If this dosen't work post back.

 

Just follow the guide.
You should put your CTRTrasnfer.bin to some folder (idk which one) on your sd and do ctrtrasnfer with GM9. if that won't work, do Decrypt9.

 

I meant the .bin after you finished modding the system
https://3ds.guide/finalizing-setup
Section VII - Backup Essential Files
Step 8
Please tell me you did step 8?

If you want to try to recover the SD card with the program I suggest you can try, If you get the files again try to restore it with GM9 and see what happens.
Otherwise just follow the guide but use Decryp9 instead https://github.com/d0k3/Decrypt9WIP/releases/tag/20170607
The process will be a little different.

 

@Jamanie2140 any update?

 

I think you screwed yourself over when you used recuva to get the sysnand backup...

recuva can only see the start and end of a file. if for any reason you made new files on the sdcard they could have ended up inside of the nand backup, so when you restored it who knows what random data was mixed in and what important files (or since sysnand is encrypted, it might all be garbage now, hence it failes to mount (ctranand))

You should have copied the sysnand backup before you deleted it from the sdcard. if any important files that are unique to your 3ds has been lost even a ctr-transfer won't save you. you should have never restored the recuva sysnand.bin

 

He can always do full CTRTransfer anyway.

 

as far as I know if you totally wipe your sysnand those unique files will be lost forever since there's no way to recover/generate them.
a ctr transfer can only help with the other files that are part of the "OS", and move you up and down firmwares and in some cases recover from bricks.

 

where has he stated, that he formated his sysnand?

 

he restored a sysnand backup that was deleted and then recovered with Recuva. that's just as bad in case the file was damaged, since it's an encrypted file, once there's "garbage" data in there the whole decryption also returns garbage. it's possible his whole sysnand is random junk and he has no way to recover it. (which would be indicated by the fact godmode9 can't mount his CTR nand (the main partition?)

 

If I remember correctly, even after recovering someone else sysnand, you can still do CTRTransfer and repair it that way. I think that sysnand backup does not have any important files that can totally screw your 3ds (maybe you can flash blank .bin backup and still recover it with CTRTransfer). None-the-less, he can at least try CTRTransfer (with godmode9 or Decrypt 9 or do Lazarus 3DS script).