How do we know if we have the faulty emmc?
- Thread starter oboefiend
- Start date
root the device (should be with CM 10.1) and download emmc check from the appstore
I was under the impression that the emmc check app from the play store was only meant for finding out the type of NAND device inside your Nook. IIRC, The actual sanity check performed by it is for a different (older) type of emmc brick bug and not the current TRIM related brick that could be observed in some CM 10.2 builds, which had TRIM enabled. So I wouldn't conclude yet, that your device is safe ... Better cross check the NAND type with the CM wiki article. (Sorry I don't have the link at hand. Just google it.)
Sent from my BN NookHD+ using xda app-developers app
Sent from my BN NookHD+ using xda app-developers app
The eMMC that has the bug is named MAG2GA.
I have this one too, but I'm running the TRIMfix Kernel for testing.
I have this one too, but I'm running the TRIMfix Kernel for testing.
eMMC chip:
Type: SEM32G
Date: 11/2012
CID (huge number)
FwRev: 0x90
Does this mean it's ok?
Yes
Sent from my BN NookHD+ using xda premium
Sent from my BN NookHD+ using xda premium
Last edited:
Yes, it's perfectly fine for you to run CM10.2 with no problems. Your device does not have the chip with the issue.
Your chip is: SEM32G, not MAG2GA. The MAG2GA chip is the one specifically with the issue.
All the best.
Just got my refurbished Nook HD+. Does it have to be rooted to get the correct information? I have made a backup of my stock and installed the emmc check from the Play store and it is saying I have the affected chip. This was done while running stock.
So if I have the affected chip, what exactly does that mean? I was planing on running CM 10.1.3 on it which I think is not affected. Will my device get slow as the memory fills up?
If you're going to run CM 10.1.3-stable, you're good to go. You don't have to worry about anything.
If however, you're planning to install CM 10.2 or decide to upgrade to it; you may have issues with the performance being degraded, as CM 10.2 is based on Android 4.3; and 4.3 introduced a new way of managing storage, using something called TRIM in attempt to increase performance.
If you upgrade to CM 10.2, and then revert back to Stock ROM, or CM 10.1.3 (or any other ROM), you will still notice the issues; as your hardware has been affected. If you try to install the TRIM kernel, that could also brick your device.
I'd only install CyanogenMod 10.1.3 (stable) and stick to it. Perhaps in the future we could solve this EMMC TRIM hardware issue; as the 2012 Nexus 7 uses the same chip, and it's been patched via a software update. In the future, perhaps we could port that patch onto the Nook.
Again, for now CM 10.1.3 is your best route.
All the best.
Even if you run CM10.1.3, you can still get lag, which is what TRIM is supposed to fix (TRIM is a repair utility, not a new way of storage). It makes no difference which you run, CM10.1.3 or CM10.2, it is possible to get lag. The difference between the two is CM10.2 has the TRIM utility built in and CM10.1.3 does not.
That said, I run CM10.1.3 and have never experienced lag. But I have a SEM32G chip too (not an buggy chip). However, many users have reported lag on CM10.1.3. Since TRIM is not built in, they run the TRIM app from the Play Store. And if they have the affected chip, some have reported a brick.
Sent from my BUN NookHD+ using xda premium
That said, I run CM10.1.3 and have never experienced lag. But I have a SEM32G chip too (not an buggy chip). However, many users have reported lag on CM10.1.3. Since TRIM is not built in, they run the TRIM app from the Play Store. And if they have the affected chip, some have reported a brick.
Sent from my BUN NookHD+ using xda premium
Last edited:
Hello guys,
I just discovered this thread and it seems that I got a bad chip (MAG2GA). Unfortunatly I installed CM 10.2 (20131106-NIGHTLY) the day I got the tablet (last week). So far I am pretty happy with the tablet but sometimes some apps are crashing. Most of the time it is chrome but not exlusivly.
Should I go back to 10.1 because of the memory chip i got? Should I send the tablet back and ask for a different device? This could be costly because I ordered in the USA but live in Germany.
Will future updates fix the problems? I planed to use the tablet at least for two years and so future updates should be possible for my tablet.
Thanks for your responses, best whishes.
I just discovered this thread and it seems that I got a bad chip (MAG2GA). Unfortunatly I installed CM 10.2 (20131106-NIGHTLY) the day I got the tablet (last week). So far I am pretty happy with the tablet but sometimes some apps are crashing. Most of the time it is chrome but not exlusivly.
Should I go back to 10.1 because of the memory chip i got? Should I send the tablet back and ask for a different device? This could be costly because I ordered in the USA but live in Germany.
Will future updates fix the problems? I planed to use the tablet at least for two years and so future updates should be possible for my tablet.
Thanks for your responses, best whishes.
So my chip is the supposed bad one. I am on liquid 4.3 and honestly it runs better than it did stock. I don't have any random errors or anything. Should I not be on any 4.3 ROM even though it says my chip is sane?
Sent from my BN NookHD+ using Tapatalk 4
Sent from my BN NookHD+ using Tapatalk 4
Attachments
I just got my Nook HD+ from BN Yesterday
Supposedly brand new but with a MAG2GA chip. Should I be angry? If it has that chip is actually a refurb being sold as new?
Supposedly brand new but with a MAG2GA chip. Should I be angry? If it has that chip is actually a refurb being sold as new?
No, they have stacks of these things they are trying to get rid of. They over ordered months ago and are trying to reduce inventory to improve their financial position. That's why the lowered prices. I don't think they are making any new ones.
Sent from my BN NookHD+ using XDA Premium HD app
If the revision number is the actual problem, then I should be OK as I have an 06. Need to try the trim command and see what happens.
Sent from my BN NookHD+ using XDA Premium HD app
Sent from my BN NookHD+ using XDA Premium HD app
I am on 10.1.3 and I ran that program and have the MAG2GA and under the Brick Bug? it lists No. Sane Chip.
I guess the program is wrong. lol
I guess the program is wrong. lol
The brickbug app is not checking for the mag2ga chip as being faulty as that's not what it was designed for.
What if you have the bad chip?
If you do have the affected chip, any predictions on what the future looks like? Are these the only rays of hope:
1) Someone ports the Nexus 7 patch to 10.2
2) Google integrates the patch logic into android core 4.4 so CM11 might be safe on Nooks?
It sounds like stock nook OS is based on 4.0.3... so doesn't sound like B&N is too hungry to push the stock OS past this barrier.
If you do have the affected chip, any predictions on what the future looks like? Are these the only rays of hope:
1) Someone ports the Nexus 7 patch to 10.2
2) Google integrates the patch logic into android core 4.4 so CM11 might be safe on Nooks?
It sounds like stock nook OS is based on 4.0.3... so doesn't sound like B&N is too hungry to push the stock OS past this barrier.
Our Apps
Get our official app!
The best way to access XDA on your phone
Nav Gestures
Add swipe gestures to any Android
One Handed Mode
Eases uses one hand with your phone