It's not just one batch. 160-0103 isn't a new or isolated error, it's been circulating for years, the new thing is verifying what causes it.
Do you have any data to back that up? I would be interested if you know of non launch consoles with hynix chip that failed that way?
Nintendo "fixes" are also a double-edged sword. Have fun losing savefiles and downloaded content or games since Nintendo just ships you a new Wii U. They aren't going to swap out/fix the NAND.
From what I heared they transferred your data. But I don't know if they trannfered the data just to a new console or replaced the eMMC. With the right tools it's easy to properly swap the chip and certainly in the capabilities of Nintendo. With the PS3 Sony even swapped the GPU, which requires much more sophisticated tools.
Yes, there are different kinds of NAND, but NAND is still NAND. The Wii U is misusing its NAND, it has little to do with using a "cheap" or "bad" one.
Why do you think it is misusing the NAND? No one said they where using cheap NAND / emmc but they just had a bad batch, which can also happen with expensive NAND. It seems Nintendo put quite some thought into using the right type of NAND for the right job. They used the large, but slower and limited in write cycles MLC eMMC as the mass storage but put the fast raw SLC NAND chip with a much better write endurance in front of it as a cache. Many middle class SSDs do something similar. Also they put the logs, which are write heavy on the SLC (but maybe they just did that because MLC gets only enabled later in the boot process). Also Android is running of eMMC for many years and your average Windows or Android should do much more writes then Cafe OS.
Its exhibiting the behavior of an end-stage SSD/SD card and that doesn't happen without a catastrophic amount of read/writes.
What makes you belief that? Data retention time can decrease with many P/E cycles, but also chips with a production error would show the same behavior. And it seems this problems affects more consoles that weren't used that much but stored away, than heavily used ones.
If a eMMC was written to death you would expect it to go to a read only mode. Because the controller would notice the bad blocks and replace them with reserve blocks, if it runs out of reserve blocks it goes into a read only mode to prevent data loss. The same is true for SD cards and USB drives.
What's your proof other than "trust me broseph" that it's only "Hynix MLC" chips? The error is years old, and can affect legitimate non-homebrew/CFW users. who's inspecting their NAND chips? Excessively few people.
But some people did and they overwhelmingly have these Hynix chips. Or at least know they have a black console from near the launch. It is good to be critical, but you aren't critical you just say it's something else without any evidence or clues.
You basically have two claims:
1. The Wii U OS is doing excessive writes (why do you think that is the case?)
2. The eMMC is failing because of excessive writes (how does this fit the data we have so far?)
Also if it were really a problem a problem of excessive writes, the 8GB models should be hit even harder. You would expect that it only endure a fourth of the total capacity written, as it only has a forth as the capacity, so the same blocks get written more often.
Community collected data like
https://hackmd.io/d12Fq9g-QlCjN2HJp7Yvew?view ... See, the community is actually collecting failed NAND reports in an attempt to get the real root of the issue while you're just talking out of your ass.
I didn't knew of that. This looks like a good resource.
From the two CIDs that were posted there both eMMCs were produced in January 2013. This point's to a longer timeframe and not just one bad batch, because mine had da production data of August 2012.
Also the Samsung just had "DATA CORRUPTION" and not "MEDIA ERROR" in the log. So there the eMMC didn't necessarily failed, but it could also be just a power off druing a write. But since we are also counting Hynix ones with just "DATA CORRUPTION" as an eMMC failure, we also have to count the Samsung one.
It would also be interesting what the base distribution of the diffrent vendors ist, maybe Nintendo just used 18 times more Hynix chips than Samsung chips.
Maybe everyone in this thread runs the mdinfo from above and posts the result, to collect some data on that.