As a test I've formatted the SYSTEM partition of an eMMC dump (using the built in format function of NxNandManager). This should set most if not all FAT32 clusters to unallocated (IIRC).
When I dump the SYSTEM partition with passthrough zeroes enabled and compress it with 7-zip, the resulting archive is still very large (around 1.7GB). I then tried it without passthrough zeroes, and the resulting archive was around the same size.
Do I misunderstand what passthrough zeroes does or is it broken?
As a test I've formatted the SYSTEM partition of an eMMC dump (using the built in format function of NxNandManager). This should set most if not all FAT32 clusters to unallocated (IIRC).
When I dump the SYSTEM partition with
passthrough zeroesenabled and compress it with 7-zip, the resulting archive is still very large (around 1.7GB). I then tried it withoutpassthrough zeroes, and the resulting archive was around the same size.Do I misunderstand what
passthrough zeroesdoes or is it broken?