yashsingh1/xdaforums huggingface dataset:
[Galaxy Note 4 General] samep:
That's comical, right? I guess you don't want the mad or insane eMMC!

If you understand the eMMC failure, it's not outright failure, initially, for many, it's unpredictable. You think you might have fixed it but then it goes crazy again later. Unexpected reboots, automatically booting to Odin download mode or just finding the boot animation stuck when investigating why your alarm didn't go off. Battery pulls and flashes may only offer temporary relief but then gets worse. Ultimately, you may lose all usefulness but these intermittent complaints are quite common with this failure.

You may eventually discover that if you use the wake lock app, haven't yet experienced total eMMC failure that you may settle things down a bit without having to frequently flash or pull battery. If readers with this issue find this to be true, you should stop trying to fix it and go with stability, get it repaired or trade up. Either way, I'd recommend the factory repair first.

But I'd like to see more tests ran and shared on failing eMMC phones. I find it odd that readers aren't sharing their test results for comparison; like failing or intermittent results for comparison. More input could help to indicate this sanity test has value? Or no value? Consider that a failing eMMC may only reboot when it detects a read or write memory error. It may pass this test but is the benchmark on par or degraded from mine? Would degraded eMMC be reflected by lower scores? Unknown with data we have so far, IMO.

If I had better answers for you, my posts would be shorter. Just know that there are likely many satisfied users not having this issue. For the moment, let's go with sane chip is good.
[Galaxy Note 4 General] dorian2kx:
I did emmc check and mine says "no sane chip" what's the difference between no sane chip and "sane chip"
[Galaxy Note 4 General] samep:
It's actually, "Brick Bug?

NO. Sane chip." Which suggests a pass.

Did you get the same result? Are you having issues? Or just concerned?

I'm looking for a result on a suspect eMMC failing eMMC to compare to see if test is reliable.
[Galaxy Note 4 General] dorian2kx:
Well I'm not having any issues at all but I was just wondering if "no sane chip" means that I have a bad device... I'm using the N910h model
[Galaxy Note 4 General] samep:
Can you post your results; two screenshots?

My initial thought that if you got "NO. Sane chip" that you got what I got. That indicates a pass. But if you got something like "YES. No Sane chip", I would think that indicates a failure. But I haven't seen such a result to say that is the result a failing or intermittent eMMC would give.

I'm under the impression that it's possible that a intermittent eMMC could pass this test because it hasn't rebooted. It may only reboot when read or write error is detected. Maybe running this test results in a read error for those with failing eMMC? Maybe each time it's ran, the result is a reboot? What happens if user with wake lock fails this test? Fails and reboots or just fails?

Need more info to really know how reliable and predictable this test is. Perhaps the bench result also helps to compare a good eMMC to bad eMMC?

But I wouldn't worry if you got the same result as mine and benchmark was similar. Posting the screenshots is optional. Thanks for participation; I just thought that sharing could help in gathering info to possibly answer questions of failing eMMC.
[Galaxy Note 4 General] dorian2kx:
Screenshots

Here they are
[Galaxy Note 4 General] jhill110:
Lol.

Maybe it should read: No, it's a sane chip. :p
[Galaxy Note 4 General] takis:
Let's just hope that it's not as wide spread as it sounds... Hope the developer of the "test" could update the app for full note 4 compatibility

(By the way which rom are you running?)
[Galaxy Note 4 General] samep:
This ROM with Beastmode r61 kernel.

https://xdaforums.com/showpost.php?p=70551180&postcount=1
[Galaxy Note 4 General] xda_johndoe:
Running with bad emmc.

NO. Sane chip.

75262, 81210, 83973

Congratulations. Test Passed.

710s.

31268536320 bytes(29.1 GB) 42.1 MB/s

See how slow internal read is? This thread or another mentioned bad emmc will have slow read speeds.

Attached:

1st screen shot, test selected was "quick".

Currently on ApocalypseX M.v6, RamKernel_RC2. N910T

2nd screen shot, before emmc

Don't remember how accurate tests are, how much effect roms and kernels have. I'm sure there are some fluctuations.

Edit: to those not having emmc, if you worry, sell it. Otherwise keep it cool, from sun, without a case(at least when putting it through torture), heavy use/data writes, etc., anything that creates excessive heat.

It sucks when it dies but device is buit for general use and not for abuse/torture or commercial heavy duty use.

Before you get a chance to hit emmc you could drop it, drown it, lose it, etc

Could always keep it turned off, in a cool dry dust free place, on a soft cushion. :angel:
[Galaxy Note 4 General] samep:
Wow. That is a difference. Thanks for sharing.

Small data shared is suggesting a trend that eMMC degrades over time or with failure. The test may pass but the noted history of failure combined with slow read suggests eMMC is failing. Slower speeds might possibly become an indication of remaining usability with more data shared.
[Galaxy Note 4 General] xda_johndoe:
Check my above post edit.

I like and use spen for different reasons. Do abuse my devices somewhat, use wise, not externally.

Still considering to get 3rd note 4 and send out one of my dead ones to Samsung for MB repair/replacement.

Could just say f(orget) it and get something completely different.

Read about flash or ssd memory.

Besides chip, there could be some other component that deals/responsible/manages with current/voltage for emmc fails.
[Galaxy Note 4 General] takis:
I have read of 190 and write of 90? Is it a sane chip indeed?
[Galaxy Note 4 General] samep:
I'm not sure what you're using to test but I got a similar result with Androbench that was suggested earlier.

SEQ RD: 213.96 MB/s

SEQ WR: 99.29 MB/s

Given that your results are closer to mine than the failing eMMC, I'd say you're eMMC is fine.

The sane definition wasn't intended to confuse IMO. I think you have to weigh the whole test and compare results to make conclusion of good or bad. It appears the stats may indicate as much.
[Galaxy Note 4 General] takis:
Well those are good news! We almost have the same read and write speeds, i believe that the particular problem would only affect the badges of the first 3 months for example?
[Galaxy Note 4 General] jhill110:
Hey T,

Looks like I'm good... I guess. Makes me feel better about selling it. Of course it's always been on my cooling stand since day one so maybe that has been a big help... Dunno.
[Galaxy Note 4 General] jphlag:
The miracle solution ?

I've seen that many peoples said that this app https://play.google.com/store/apps/details?id=eu.thedarken.wl&hl=fr has stopped all the random reboots etc etc of their note 4... So first, is the problem of all these guys related to an eMMc chip degradation ? and second, how does it resloves the eMMc problem ?

BTW, I had some issues with rebooting when the battery was at ~35% that was resloved when using a new battery and this app... IDK what's resolving this problem... Could be cool if you give me some answers ;)
[Galaxy Note 4 General] samep:
Read the thread and run the benchmarks for comparison.

Current theory is that failing eMMC requires the wake lock app to limit the reboots but also failing eMMC may be slow to read and write. This is tasking on the battery, adds more unnecessary heat to add to its demise and failing eMMC may eventually become unusable so repair is recommended.

There are users that don't require the wake locks to prevent reboots. I think it's unknown why some fail and others don't but limiting heat and replacing battery with healthy battery may prolong eMMC. Multiple flashes and formatting may also wear eMMC prematurely.

Let's hope UFS memory lasts longer and users can still unlock bootloaders and flash all the custom ROMs, kernels and mods they wish to in future phones.
[Galaxy Note 4 General] jphlag:
Here's the result after a day of use and already heated (and cooled down but still a little hot) phone...

So, are the results good or bad ?
[Galaxy Note 4 General] samep:
I'd say it was your battery. You don't appear to have the failing eMMC problem. Your reboots are gone, right? If so, you wouldn't need to run a special wake lock. All true? Just relax and don't worry about it.

There's been a few that experienced reboots with bad battery. It's more likely a bad battery would just shutdown; I know my original battery did that but that was Lollipop or KitKat. But I won't disagree with those reporting that issue; it must be legit. Maybe it's more akin to bad battery on Marshmallow?
[Galaxy Note 4 General] jphlag:
Ok, thanks for the help ! I'm gonna see what it does when I remove the wake lock ;)

Have a nice day (or night for me ^_^)
[Galaxy Note 4 General] notachamp:
Before you do anything try to wait one day without battery and maybe flash twrp recovery and everytime when you start flash something or starting phone you have to wait about half hour or more without battery. There some stock zip file roms to install in this forums. But better would be if you can to replace the hardware by samsung.

And yh there's other story if nothing helps u must flash with odin pit file and same rom of that pit file in odin, but there u have to be carefull to not hardbrick.
[Galaxy Note 4 General] uinnierimu:
do you have n910g repair firmware for N910GDTS1DPK3 note 4 n 910 g singapore singtel sin for phone version csc pit file ?
[Galaxy Note 4 General] notachamp:
No but you can check the forums in search, but better be carefull i had same problem and now my phone seems to work without flashing the pit.
[Galaxy Note 4 General] yashthemw:
Have you guys checked this thread?

https://xdaforums.com/showthread.php?t=3488114
[Galaxy Note 4 General] catemu:
Which files did you use? I have the same eMMC issues and the same Note 4 model. Thanks! :D
[Galaxy Note 4 General] uinnierimu:
can you create repair firmware for me please ...... n910g repair firmware for N910GDTS1DPK3 note 4 n 910 g singapore singtel sin for phone version csc pit file ?
[Galaxy Note 4 General] :
Hi ,

whenever i try to boot my phone in download mode to perform the flash it does not restart and goes into deep sleep mode and does not boot , and then randomly it boots after some days when i try to start it .

please suggest something
[Galaxy Note 4 General] vihitshah:
Hey as soon as i flashed it and wiped the data and all it din turn on i mean it faced the same issue.
[Galaxy Note 4 General] piku2008:
Well I got note n910g Indian Version and I have got emmc error this morning but somehow my recovery still works fine so I am on custom ROM as such no problem ............

According to me emmc error only occurs when trying to restore the stock firmware .....

so as of now I am not trying to go back to custom ROM !!!
[Galaxy Note 4 General] Eudemony:
here is the direct link for the 4.4.4 N910G repair firmware https://www.androidfilehost.com/?fid=24407100847294499

Not gonna promise any greater success but it's there if you want to try it ;)
[Galaxy Note 4 General] gusrech:
Does anyone have the firmware repair of the n910c Android 6.0.1?

Enviado de meu SM-N910C usando Tapatalk
[Galaxy Note 4 General] Saahil Shaikh:
bro facing the problem code: mmc_read failed the solution you provided will it solve this problem because I tied flashing stock rom and odin showed fail and it also says could not do normal boot........
[Galaxy Note 4 General] Blackburn119:
Did you mean it occurs when trying to restore the stock firmware with nandroid backup or Odin or any other methods?
[Galaxy Note 4 General] cash2387:
Found this posted on another section of XDA. Worth dropping the lawyers office an email I think

http://www.classlawdc.com/2017/04/25/investigation-samsung-galaxy-note-4-mmc_read-failed-defect/
[Galaxy Note 4 General] Blackburn119:
What happen if those lawyers and consumers win this case?
[Galaxy Note 4 General] cash2387:
Good question, I'm not sure to be honest. I did email them though and seeing if I get a reply. I'm not in the US, I'm in Canada. So I don't even know if I could get added to it.
[Galaxy Note 4 General] megaequs:
recover files from internal storage.....

Dear community. sorry if that's the wrong thread, but I don't know where to write my problem.....

I have accidently flashed a csc for my Note 4 and this forced a factory reset.... Is there any way to get my files back? I am not using the phone for now, to not write more and more files to the partition. Please Help me, I lost very important files and

need the file structure back

, not photos or contacts or this stuff....
[Galaxy Note 4 General] xxTECRAxx:
I sent in an email and I'm in California. Hoping to get a response as Samsung just sent my Note 4 back UNREPAIRED! Yes, you read that correctly. I sent it in for them to repair it and I got back my phone with a note saying "... not economical to repair my phone."
[Galaxy Note 4 General] cash2387:
That is nuts!! Like not even repaired. Let us know if you get a reply back from them. I'm hoping if they do reply to me, being in Canada wouldn't be a problem (fingers crossed anyways)
[Galaxy Note 4 General] cash2387:
So I did get an email back from the Lawyers. They are not currently working with any other offices outside the US. So looks like I'm SOL...But anyone who is in the US should check that link out and get in on that. Samsung needs to be held accountable for an obvious defect.
[Galaxy Note 4 General] Hider141:
Well, the Note4 is an outdated device and nowadays the cost of a new motherboard is even 70-80% of it's price. That's why they say it isn't economical to repair it.

If it's still under warranty then they should've replaced it with a working Note4 if they had one, or give you either an equivalent phone, or your money back.
[Galaxy Note 4 General] gigilazu2001:
Solution.. Install Deep sleep battery saver app, dev. by Antek Mobile

I recently install Resurrection Remix OS Rom, Nougat 7.1.1. and Deep sleep battery saver app, dev. by Antek Mobile. It seems to work without Wake Lock or Cpu Awake.

I think the problem is with Cpu deep sleep .

Maybe this app is the solution in order to solve the problem, but in the oppsite way it is solved by Wake Lock. The advantage is huge: the battery is saved!

Try it pls. Give me a sign!

Gigi L.
[Galaxy Note 4 General] arnookie:
What setting did you use

What setting dud you use in deep sleep battery app?
[Galaxy Note 4 General] gigilazu2001:
Slumberer mode - root accces

I have root access and I have set slumberer mode.
[Galaxy Note 4 General] zenn-:
Hi everyone, I'd like to say that this app works for me. I have a N910G running Emotion Revolution R18.1 (MM 6.0.1) and like many others, I took to using the Wake Lock fix when the dreaded eMMC read_fail error suddenly occurred. When I was using the Wake Lock app, I had to charge my phone 2-3 times over the course of the day as the idle battery drain was already ~5%/hr. My battery used to drop ~40% overnight on flight mode.

But after I switched to using Deep Sleep Battery Saver app on Slumberer mode, the idle battery drain is pretty much back to normal and the phone isn't as warm during normal usage as when Wake Lock is running. I also noticed less stutters and lags as compared to when using Wake Lock.

I'd recommend users to turn off the Wake Lock app and try using Deep Sleep Battery Saver app on Slumberer mode. You'll get a much more usable phone in the end.

P.S. I've been lurking around since the Galaxy Tab P1000 days. I basically created an account to share the significance of using a different app. ;)
[Galaxy Note 4 General] gigilazu2001:
The launcher is very important!

I agree with you a lot.

I think the launcher is very important.

Best for me is Nova.

Otherwise I loose stability of my Note 4.
[Galaxy Note 4 General] jackherer72:
Emmc read failed. Your flash chip is almost dead. There is no software solution. I bought a note 4 of a year old with broken screen for 50 Euro. Have replaced the motherboard by my self. Cheapest solution. And back to race room v11:):)
[Galaxy Note 4 General] zenn-:
Right, I know there's no permanent software solution for a hardware problem. But while I'm tempted to do exactly what you did (buy a broken screen note 4 for its board and swap it), I'm held back by the fact that there's no guarantee that the next note 4 will not suffer the same eMMC fate eventually...
[Galaxy Note 4 General] akromatic:
i'm kinda having issues flashing any of those fixes, getting all sorts of errors.

anyhow just out of curiosity, is there any way to just run and boot the device entirely off the microSD card and avoid internal storage all together? i remember my HD2 was running entirely off the SD card and how SD cards are alot larger and faster then before.
[Galaxy Note 4 General] morph1976:
Emmc fail

I keep getting this message on UK version of note 4 n910f. I've tried the recovery files, changed the pit file etc. When I use Odin it almost completes (id guess 95%) till it gets to "hidden" then fails. Is it dead and new motherboard required or is it salvageable
[Galaxy Note 4 General] Hagis:
You can flash this rom without hidden.img.

It is common issue in many phones.

here is example tutorial
[Galaxy Note 4 General] jackherer72:
there is nothing to do with mmc read failed. Your chip is almost dead. buy new motherboard or phone. This discussion is useless
[Galaxy Note 4 General] gigilazu2001:
Thank You very much. Wonderfull!!
[Galaxy Note 4 General] Henkl:
and? does it still work?
[Galaxy Note 4 General] hagis01:
Yeeep. Just like when i bought it. No problems so far.

Wysłane z mojego SM-G950F przy użyciu Tapatalka
[Galaxy Note 4 General] Henkl:
wow. How long did you hold it in the oven? 200 degrees celsius?
[Galaxy Note 4 General] Hagis:
200 degrees, 8 minutes . Then slowly cooled with open doors. I covered flash and heartbeat sensor with additional tinfoil - maybe unnecessary.
[Galaxy Note 4 General] Saki01:
I have done the same & my MB is now dead. These parameters does not guarantee success.

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[Galaxy Note 4 General] Henkl:
Preheated oven?

---------- Post added at 08:42 PM ---------- Previous post was at 08:41 PM ----------

Emmc write error with everything I did. So mb is dead to me
[Galaxy Note 4 General] ultrabuzz:
I read through this thread back in March '17 when my Note 4 started having this very issue. I bought it back in Dec 2014 any I've been patiently waiting for a new, working Note ever since. Note 5 had no flash card support so it was an instant no-no for me. There was no Note 6. Note 7.. well, we know the story. So to wait yet for another reincarnation of the Note, I bought a busted screen Note 4 to do a board swap, after seeing that it's a hardware issue and no fix existed.

When I bought the broken Note, I made sure that it was never opened and manufacture date was much newer than mine. It was a late 2015 model so I thought that could buy me at least a year for Note 8 to be released and prices settled. Well, not so much. 7 months later another board failed with the same problem..

I think I'm done with my Note 4 now :) but wait!.. do I buy Note 8 or was the Note 3 the last truly working pen enabled phablet from Samsung?
[Galaxy Note 4 General] Krauthaus:
Hey Dudes, I own a 910F. This EMMC bug is really freakin me out, do anybody have knowledge about a trustable supplier of spare parts who delivers in europe? I want to buy a new motherboard since I really like my note! I got the skills to replace it, but I am not sure about buying one at ebay because it could be a dissembled one with the same bug my phone got. :D
[Galaxy Note 4 General] samep:
You might check with your carrier. Maybe they can get a comparable offer to replace motherboard through Samsung?

Samsung seems to be hit or miss. They may have lost interest knowing they may be losing potential new sales by repairing a popular phone. But not everyone wants to buy a phone they cannot root.
[Galaxy Note 4 General] msg4life209:
Its hardware... Simple I fixed mine.

I can tell you how i fixed it. This is the only fix for EMMC.....

No need to replace motherboard.

No need to change software.

-Well lets cover what the cause is. The issue the processor overheats constantly and makes the solder connections separate. Thats why when it gets cold it tends to work like normal till it heats up. I took apart the phone and used heat gun heat up the EMMC and put a little weight on it to push it back down. Then let it cool. Hooked up everything and Guess what.. Phone works perfectly now.
[Galaxy Note 4 General] Kueh:
How hot and how long?
[Galaxy Note 4 General] msg4life209:
The heat gun I used was set for 235C. The components surrounding the EMMC were covered not to get direct heat and it was heated up for about 5 minutes moving around the chip. The phone is still working BTW. I have made sure to underclock it so it doesn't get that hot ever again. Oh and its amazing how fast this phone is especially now that its fixed. The EMMC issue and using wakelock make the phone so sluggish. Oh and before my phone wouldnt charge off. Now it charges off and runs like a brand new phone.
[Galaxy Note 4 General] dzebrys:
could you test it with androbench? it shows emmc read/write performance.
[Galaxy Note 4 General] msg4life209:
Read write.

SeqRead 197MB/S...write 127.. Random read 4872 iops write 2744 iops
[Galaxy Note 4 General] dzebrys:
done the same to my board and can confirm it's working. so the problem most likely lays in lead-free soldering paste which catch dry joint with age.

the most complex is to disassembly lcd with board from frame. but after few rounds I'm able to do this in under minute ;) my advice is to start from battery side (left facing the lcd), then other side, then top, then pull right bottom corner through spen and then start final dismount from top right corner using blade or pry tool by inserting it full through on the other side. I've found the left side somewhat stuck harder and most likely one dismount lcd from board not from frame. from the top right side it's much easier to insert the pry tool and fully separate frame from lcd+board assembly. also note that at the middle bottom close to the USB there is a plastic clips which keeps it harder to do the dismount from bottom (one need to bent the frame harder than doing the same on top side). so first full top separated then unglue sides and then pull the bottom part a little up in top frame direction.
[Galaxy Note 4 General] Saki01:
Did you also put some weight over chip?

I'm not sure how weight.

I've been told by technicians in service that chip is sealed with some kind of plastic on board and that's the reason why it is not easy to change EMMC.

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[Galaxy Note 4 General] rob_z11:
Would you mind posting a video or something? I ended up swapping mother board, but i still have the old board, and wonder if I should buy broken note4, and replaced the motherboard as spare for son and I.