Hacking I keep hearing rednand this rednand that

[funnystory]

What is rednand? Is this like a renamed emunand? Could someone be so kind to explain?

 

[Just Passing By]

What is rednand? Is this like a renamed emunand? Could someone be so kind to explain?

It's full title is "redirected nand" it's basically a type of emuNAND not affiliated with GW's emuNAND. Only worry about it if you have a n3ds with a 1.8 gb nand size.

 

[Quantumcat]

What is rednand? Is this like a renamed emunand? Could someone be so kind to explain?

RedNAND is nearly the same as emuNAND but with a slightly different structure so it can be smaller. There was a thread today asking about the difference between the two, and it attracted a number of replies including at least one very detailed explanation. Try the search bar or scroll down the first page & try the second page if it's not there.

 

[Cuphat]

It is a different type of emuNAND. "Normal" emuNAND is Gateway emuNAND, as their version ended up being the de facto standard since everyone just used their style. Both RedNAND and Gateway emuNAND are styles of emuNAND.

 

[Just Passing By]

Wut r sirch bars?

http://gbatemp.net/threads/practical-differences-between-emunand-and-rednand.421884/

 

[funnystory]

It is a different type of emuNAND. "Normal" emuNAND is Gateway emuNAND, as their version ended up being the de facto standard since everyone just used their style. Both RedNAND and Gateway emuNAND are styles of emuNAND.

So why are they calling it rednand instead of emunand. That creates unnecessary confusion IMO. I don't use emunand anyways but I was just curious.

 

[Cuphat]

So why are they calling it rednand instead of emunand. That creates unnecessary confusion IMO. I don't use emunand anyways but I was just curious.

Because something having support for GW-style emuNAND does not mean it has support for redNAND-style emuNAND.

 

[frosty5689]

I will just copy and paste what I posted in AuReiNAND's thread

Looking at the differences between RedNAND and EmuNAND, we can assume the CFW needs to correct the offset for every read/write request to NAND.

RedNAND:
1. 3DS firmware requests for access to some place in NAND
2. CFW Calculate offset using formula: offset + 512
3. CFW redirect read/write to SD Card.

EmuNAND
1. 3DS firmware requests for access to some place in NAND
2. CFW Calculate offset using formula:
if (offset < 512) {
actualOffset = EmuNANDSizeInBytes + offset;
}
else {
actualOffset = offset;
}
3. CFW redirect read/write to SD Card.

This is just an abstraction and the calculation could have off-by-one error as I quickly wrote it up.
But having to do integer comparsion for every request is always going to take longer than always adding 512 to the offset.
Now this has a negligible impact on performance, but it still impacts performance.

Here's the original post by neobrain comparing the two for those who is into technical stuff:
https://gbatemp.net/threads/emunand-rednand-technical-implementation.401969/#post-5783813

 

[Quantumcat]

So why are they calling it rednand instead of emunand. That creates unnecessary confusion IMO. I don't use emunand anyways but I was just curious.

Because they are different things, so they need separate names.

 

[funnystory]

Because they are different things, so they need separate names.

They really aren't though,they are both emulated nands.

 

[ihaveahax]

They really aren't though,they are both emulated nands.

they both serve the same purpose in the end, but the way they function is different.

RedNAND just places the NAND image at offset 512 bytes on the SD card. EmuNAND moves the header at the end of the NAND image.

https://www.3dbrew.org/wiki/NAND_Redirection

 

[Quantumcat]

They really aren't though,they are both emulated nands.

A boat and an aeroplane are both ways of transporting people, but they're not the same thing.

 

[Lucifer666]

A boat and an aeroplane are both ways of transporting people, but they're not the same thing.

yeah but you don't call a boat 'transport vehicle' and an airplane 'airplane'

EmuNAND sounds like it should be inclusive of all emulated NANDs

I'm not OP I just agree with his point that the names are weird. @ OP it's to do with the fact that GW EmuNAND came first so they just used that name

 

[Billy Acuña]

In short, redNAND is superior than emuNAND, right?

 

[Quantumcat]

yeah but you don't call a boat 'transport vehicle' and an airplane 'airplane'

EmuNAND sounds like it should be inclusive of all emulated NANDs

I'm not OP I just agree with his point that the names are weird. @ OP it's to do with the fact that GW EmuNAND came first so they just used that name

Gateway EmuNAND and EmuNAND are synonyms nowadays. A bit like how band-aid (a trademarked brand name) is synonymous with wound plaster. There are plenty of plasters that aren't of the brand band-aid. If you wanted to specify a plaster that was a different brand (e.g. Elastoplast) you have to say Elastoplast. Because maybe Elastoplast is a different size so if you have a particular cut you need that one and not a band-aid branded one.

Waffled a bit but tldr;
Band-aid meaning all plasters is like emuNAND meaning all emulated NANDs
Band-aid meaning just band-aid branded plasters is like emuNAND meaning only gateway emunands
Elastoplasts are always RedNAND emulated NANDs.

--------------------- MERGED ---------------------------

In short, redNAND is superior than emuNAND, right?

Yes except some tools can only deal with gateway emuNANDs.

 

[linuxares]

They really aren't though,they are both emulated nands.

FAT and FAT32 sounds the same, do more or less the same, but they aren't the same.

 

[zoogie]

A boat and an aeroplane are both ways of transporting people, but they're not the same thing.

This is more like two same-model airplanes with different fuel tank sizes.

 

[funnystory]

This is more like two same-model airplanes with different fuel tank sizes.

People like to argue to argue on here,it is pretty common.