I have followed a guide posted here that allowed me to shrink my rawnand backup from 30.0 GB to 2.5 GB (when RAR'd)
and it involved mounting the USER partition via HackDiskMount, saving original data, formatting USER partition and then
moving original files back. It worked great and I can confirm my switch runs fine using that modified rawnand, however ...
I've noticed using a hex editor that the original OEM partition is actually different before and after the format procedure,
and I've included an image to illustrate this below. It shows the SYSTEM partition as I don't have the original USER one.
What I'm asking for is a clean empty copy of someone's USER partition taken from a rawnand backup, here's the instructions:
Make sure to use a copy of your rawnand.bin as this modifies the file, and after we're done you will delete the file anyways.
1) Open HackDiskMount, load a copy of rawnand.bin, double click USER partition, enter BIS Key 3, click Test, should say OK, don't click Save.
2) Next click Mount as drive S:, don't check "Passthrough" or "Read Only".
3) In Windows Explorer go that mounted drive S: and remove everything.
4) Next click Unmount in HackDiskMount, and close the software.
5) Now open NxNandManager, load that same rawnand.bin, click USER, then Advanced Copy, Select "Decrypt" and "Passthrough Zeros", and click Dump.
6) Next use WinRAR to compress that file and it should shrink from 26 GB down to 1.4 MB, because it's 99.9% zeros!
The file created will be completely empty but it will contain the OEM FAT32 info I need.
Thanks!
and it involved mounting the USER partition via HackDiskMount, saving original data, formatting USER partition and then
moving original files back. It worked great and I can confirm my switch runs fine using that modified rawnand, however ...
I've noticed using a hex editor that the original OEM partition is actually different before and after the format procedure,
and I've included an image to illustrate this below. It shows the SYSTEM partition as I don't have the original USER one.
What I'm asking for is a clean empty copy of someone's USER partition taken from a rawnand backup, here's the instructions:
Make sure to use a copy of your rawnand.bin as this modifies the file, and after we're done you will delete the file anyways.
1) Open HackDiskMount, load a copy of rawnand.bin, double click USER partition, enter BIS Key 3, click Test, should say OK, don't click Save.
2) Next click Mount as drive S:, don't check "Passthrough" or "Read Only".
3) In Windows Explorer go that mounted drive S: and remove everything.
4) Next click Unmount in HackDiskMount, and close the software.
5) Now open NxNandManager, load that same rawnand.bin, click USER, then Advanced Copy, Select "Decrypt" and "Passthrough Zeros", and click Dump.
6) Next use WinRAR to compress that file and it should shrink from 26 GB down to 1.4 MB, because it's 99.9% zeros!
The file created will be completely empty but it will contain the OEM FAT32 info I need.
Thanks!
Attachments
Last edited by Escape1975,