yashsingh1/xdaforums huggingface dataset:
[Nook HD, HD+ Android Development] Nuor60:
I have a question regarding hybrid. As I understand I can create a "hybrid install" and it will make no initial changes to my internal storage other than to add a cm_data folder. All other differences from a "Pure SD install" are internal links created on boot from the "Hybrid SD card"? Meaning I can install a hybrid install and it would not effect any existing stock apps or data (other than append data in shared apps?); or for that matter I could have a separate "pure SD install" card and the "hybrid install" card would not effect it in any way other than that the data would not be shared?

Could someone clarify where my misunderstandings might be?

thank you
[Nook HD, HD+ Android Development] leapinlar:
You have it right on both cases.
[Nook HD, HD+ Android Development] i_m_jughead:
Can you point me as to how you use your t4i with HD+?

Thanks in advance
[Nook HD, HD+ Android Development] Nuor60:
Maybe I missed it. Is there a pre-configured zip that automatically mounts the second fat32 partition (ie P3) of the hybrid SD install while booted from from stock instead of from the 10.1 hybrid SD? Say mount partition 3 as ex_sd2 or similar. There is a large shared portable space there that could save common files I might wish to protect from factory reset.
[Nook HD, HD+ Android Development] leapinlar:
If you look in my old hybrid thread that is now obsolete and I have a zip to do just that. I guess I should move it somewhere else since no one goes there anymore. Look here:

http://xdaforums.com/showthread.php?p=38153094

Sent from my Nook HD+ running CM10.1 on emmc.
[Nook HD, HD+ Android Development] Nuor60:
Thank you very much. That worked perfectly. I did a search but still missed it somehow.
[Nook HD, HD+ Android Development] vimesxda:
So i updated this version over the old one but its not working it seems. Just boots to cyan logo but the stargate loader screen never comes up. I thought maybe i'd just try flashing an older version over it, but i cant access internal storage from cwm recovery screen. Cant mount emc. Is there a way to fix it or is it just a format and re install. And if so, should i use the backup and restore fuction on the bootloader or can i copy and paste directly across? Cheers
[Nook HD, HD+ Android Development] treubber:
I'm new to the process for the Nook, using a class 4 16GB Sandisk. Can get to the cyanoboot menu only when doing pure SD card install. I can install the zips as stated in the OP, but upon reboot the screen stays black for an extended period of time. I've let it sit for 30 minutes and nothing. Based on what I've read in the thread, this is not normal.

I actually wanted to do hybrid install, but I'm not rooted and I get an install error that looks like a B&N stock error screen that tells me to visit B&N support if the error continues. Any thoughts?
[Nook HD, HD+ Android Development] vimesxda:
Basically the same problem i got when i updated it, just stays on a black screen doesn't actually load in. Certainly be interested to hear some ideas on how to fix it.
[Nook HD, HD+ Android Development] Nuor60:
As best I recall, after the 2.1.1 update, the first reboot back into hybrid took quite some time before it finally started up - maybe 15 or 20 minutes.
[Nook HD, HD+ Android Development] Nuor60:
ExFat on third hybrid partition

Has anyone attempted to load the current hybrid image - pull it before you write the zip - reformat the 3rd partition as ExFat - restart CWM and write the zips? Can this version of CWM even read an ExFat format? I'd like to load some large media files on my SD and my understanding is I'll need something other than Fat32 to handle 4GB+ files.
[Nook HD, HD+ Android Development] treubber:
Thanks, I'll give it another shot and let it sit longer. Still no success with the hybrid install.

Edit: I got it working by switching to win32diskimager to create the SD card. I was using wimimage before.
[Nook HD, HD+ Android Development] vimesxda:
Well I turned the tablet on today and after a couple of minutes of black screen it actually booted, so a strange bug it seems. So far its running pretty laggy but maybe a reboot will fix that.

So rebooted it a few times since, sometimes it gets stuck on the loading animation, other times it gets in but the loading takes a long time and the loading animation gets all skewed. Seems to be buggy, not sure why.
[Nook HD, HD+ Android Development] bokbokan:
Initial SD install of CM10.2/SGT7 ROM for HD+ available now. Get it here.
[Nook HD, HD+ Android Development] notjustafone:
do read_ahead_kb settings increase performance?

Hi, I've been running the puresd cm10.1 for a couple of weeks now (Sandisk 32gb Class 10) and have been blown away by how well it runs. Thanks to all the developers!!!

I read an article about read_ahead_kb settings and tried it using SD-Booster, bumping the setting up from 128kb (default) to 1024kb. Using SDTools to measure write speeds, the test results went from 18mbps to 22mbps.

Test results look good, but I would guess that they are not a true measure in this situation. Anybody know if changing the read_ahead_kb settings will actually increase performance? If so, any ideas on "optimal" size?
[Nook HD, HD+ Android Development] i_m_jughead:
restoring back up

This might be a stupid question...is there a way I can restore a backup that I did on my old nook HD plus to a new nook HD plus? When I try to do a restore it gives error not being able to load /data.

I was on latest cm version with the hybrid setup
[Nook HD, HD+ Android Development] leapinlar:
You can do a restore, but only after you have made a new hybrid SD and booted it once so that the partitions are set up properly first.
[Nook HD, HD+ Android Development] jcesar085:
I have a hd+ stock and i have follow this thread but its not turning on anymore. My battery is at 14% and it only turns on when i take out the sd card out.
[Nook HD, HD+ Android Development] leapinlar:
14% is too low. It needs at least 15%. Charge it up.

Sent from my Nook HD+ running CM10.1 on emmc.
[Nook HD, HD+ Android Development] jcesar085:
yes i will wait about 20 minutes but i am still in step 5 if not it might be the sd card that is causing this problem maybe.
[Nook HD, HD+ Android Development] leapinlar:
The SD does cause it to draw more current when on, that is why it turns off at 14% with it in.

Sent from my Nook HD+ running CM10.1 on emmc.
[Nook HD, HD+ Android Development] jcesar085:
well it did not charge very much only at 30% and tried it again no luck still only when sd is out. I'll continue tomorow and leave it charging so its fully charge.

What would happen if i put the sd card while the nook is on?
[Nook HD, HD+ Android Development] digixmax:
I'd suggest checking your SD boot files (MLO, u-boot.bin), they might have been corrupted making the SD no longer bootable.
[Nook HD, HD+ Android Development] leapinlar:
Putting the SD in when the nook is on and booted will not hurt it. It is only during the boot sequence that it looks at the boot files there.

Sent from my Nook HD+ running CM10.1 on emmc.
[Nook HD, HD+ Android Development] jcesar085:
So i have formatted the sd card and followed all the steps, it works. Now its not doing anything when loading from CM10 from SD, the screen is on but it is all black. I'll just leave it on and see what happens tomorrow. edit: Still on after 15 minutes.

Note i am using one of those cheap centon 8gb microsd card .
[Nook HD, HD+ Android Development] leapinlar:
The cheap card is your problem. Get a SanDisk class4 card. It will make a world of difference.

Sent from my Nook HD+ running CM10.1 on emmc.
[Nook HD, HD+ Android Development] jcesar085:
I left it on the whole night and nothing happen so I'll just try to buy a new 4gb SD card, as I already have enough space on the nook. Thanks I'll try it later today.
[Nook HD, HD+ Android Development] jcesar085:
Yes the cheap sd card was the problem, i just bought a sandisk 16gb card class 10 and worked perfectly.

OT: I have nook color that i want to reset but there are a couple of apps that is no longer on the playstore that i really want so is there anyway i can put the app apk on my dropbox account?

Anyways though thank you for the help.
[Nook HD, HD+ Android Development] leapinlar:
Just copy the apk from /data/app to your PC or somewhere you can get at it. Then install on the HD+.

Sent from my Nook HD+ running CM10.1 on emmc.
[Nook HD, HD+ Android Development] Kaparahia:
Hi

A have problem with installing cm10.1 to hybrid sdcard. After flashing device it goes reboot and load to cm10.1 hybrid. But screen is black and nothing happens. ADB said that device status is "device". Sdcard is Sandisk 16Gb 4 class. :(

Please, advice.
[Nook HD, HD+ Android Development] bokbokan:
OP updated 20130911
[Nook HD, HD+ Android Development] bokbokan:
OP updated 20130919
[Nook HD, HD+ Android Development] mpeg3s:
Can P3 be converted to NTFS after initial OS setup?
[Nook HD, HD+ Android Development] leapinlar:
I don't know for sure, but probably. But you will need a fairly recent ROM since NTSF recognition was only recently implemented in CM. And you are talking about the Hybrid p3, right?

Sent from my Nook HD+ running CM10.1 on emmc.
[Nook HD, HD+ Android Development] mpeg3s:
Yes, Hybrid P3.

I was going to try Ext4, but it's not easy to convert like NTFS.
[Nook HD, HD+ Android Development] leapinlar:
Try it. If it does not work, format it back to fat32.

Sent from my Nook HD+ running CM10.1 on emmc.
[Nook HD, HD+ Android Development] kkt12:
I cannot locate a boot partition or an existing ramdisk.hybrid file on the internal storage of my nook hd+. i thought I'd been using a hybrid install of CM10.....does this mean my attempt to do a hybrid install of CM10 had "failed" or am I maybe missing something?

Should I just start from scratch here and try a totally new hybrid install, of CM 10.1?
[Nook HD, HD+ Android Development] leapinlar:
It is not on internal storage. It is on the boot partition of the SD. Pull the card from the nook and insert it in your PC card reader and you will see the boot partition.

Sent from my Nook HD+ running CM10.1 on emmc.
[Nook HD, HD+ Android Development] kkt12:
thank you. that didn't occur to me because I though it was the hybrid data on the emmc that needed to be modified. especially since step 3 involves overwriting/deleting the data on the sd card (which would include the very same ramdisk file copied in step 2). confusing. not sure what the point is.
[Nook HD, HD+ Android Development] leapinlar:
I admit those instructions are confusing by running those paragraphs together. What you call step 3 (it has no number) applies to a completely new installation, not an update to the hybrid ramdisk. If you are just updating the hybrid to new version of ramdisk.hybrid, just do the bolded text, not the stuff in the parentheses and below. His warning is that if you were running MY hybrid previously, it would overwrite the data in my hybrid.

Sent from my Nook HD+ running CM10.1 on emmc.
[Nook HD, HD+ Android Development] shorty1993:
How does speed, operation, reliability, etc differ with SD card ROMs as opposed to EMMC
[Nook HD, HD+ Android Development] bokbokan:
OP updated 20131016
[Nook HD, HD+ Android Development] smatticus:
new build crashed, had to revert

So I had updated to the new build, but the screen would go black causing me to reboot. After the first few times, however, I could not get the cynoboot menu to appear without multiple attempts at turning off the nook, removing the card, reinserting it, and booting again. Even then if I did not act quickly, the cynoboot menu would lock and I'd have to start over. I was starting to think the card had gone bad, but reverting back to the 10/16 build fixed my issues. Did I somehow screw up? Should I only download the updates to the nook storage instead of the SD card? Hopefully this is something on my end and not the build itself.
[Nook HD, HD+ Android Development] lorddunlow:
Is anyone else having wifi issues on the past 3-4 builds? When the Nook sleeps for more than a couple of minutes I have to toggle the wifi off and back on or it doesn't work.

I apologize if this is a known issue. If no one else is seeing this, any ideas what I can do fix it?
[Nook HD, HD+ Android Development] smatticus:
No WiFi issues but plenty of issues with chrome.
[Nook HD, HD+ Android Development] gbertoli:
Lost "SD Card" after adding user

I added a second user and now the system reports that it can't mount the sd card and any app that is looking for extra storage won't run. Notification says "Damaged SDCard, reformat" for both users. Has anyone seen this before and have a solution?
[Nook HD, HD+ Android Development] leapinlar:
Are you sure you are running CM10.1 from this thread? Check your settings to be sure.

Edit: you said 10/6 CM10.1 in the other thread. I have not heard of this issue before. Anybody else?
[Nook HD, HD+ Android Development] gbertoli:
Returning to B&N Stock, what folders did you create?

If I wanted to erase all traces of your Hybrid installation, exactly what folders need to be deleted from EMMC (Internal) storage?
[Nook HD, HD+ Android Development] leapinlar:
/data/cm_data.
[Nook HD, HD+ Android Development] gbertoli:
I have a /int-data/cm_data is this it?
[Nook HD, HD+ Android Development] leapinlar:
Yes, but it only shows that when booted to hybrid. Don't delete it when booted there or it will crash. Boot to stock and delete /data/cm_data from there. If stock is not rooted, you can't do that so you must reset stock so it wipes it.
[Nook HD, HD+ Android Development] grimem:
Would this method work with cm10.2 also? Would really like to dual boot stock and 10.2

Thanks!
[Nook HD, HD+ Android Development] leapinlar:
No. He has a new thread for CM10.2 that uses a different SD method. But that allows dual booting.
[Nook HD, HD+ Android Development] grussinko:
Hi folks - I just picked up an HD+ for my fiancee on the cheap and was hoping to do a hybrid install so she could try it with CM and see if she preferred it over stock.

I had trouble getting the SD to boot after writing the image but after reading through the thread regarding SD boot problems, I formatted the card and created the partition manually, wrote the files out of the img to the SD card and it booted to the cyanoboot screen.

It sat there for a few moments then rebooted, but when it rebooted it went to a stock Nook screen saying Update Failed, and eventually reboots back into stock after a few minutes.

Any thoughts on what might be going wrong during the first boot of the SD that would cause it not to work on the reboot?
[Nook HD, HD+ Android Development] grussinko:
Nevermind, switched to Win32 Disk Imager instead of Roadkill's and it worked fine.
[Nook HD, HD+ Android Development] bokbokan:
OP updated 20131230

Boot animation fixed.
[Nook HD, HD+ Android Development] elinter:
Thank you

Just wanted to say thank you for your work on this. My wife wanted a tablet that she could use with the Korean language and this worked perfectly. :good:
[Nook HD, HD+ Android Development] Vaizard84:
is anyone else having an issue with the wallpaper reverting to stock on a reboot? Whenever i change the wallpaper and reboot the wallpaper i set changes to the stock one
[Nook HD, HD+ Android Development] lorddunlow:
Actually, mine reverts to stock whenever I have a memory related crash (running Pandora while also using several tabs in Chrome).
[Nook HD, HD+ Android Development] Vaizard84:
The wallpaper stays the same no matter what app i use, it just seems to be a reboot that changes it
[Nook HD, HD+ Android Development] xdajauser:
Hello everyone!

I got the SD install CM10 following this thread!

Everything probe so far works great except 2 things:

1 In order to use stock have to turn off the device and remove the card with CM. It does not work stock option pressing N button when CM boot. It stays at 99 percent according to the boot graphical which always appears when stock boot. What could it be?

2 One of the reasons for using CM10 from SD was to see if the screen has blue trend. I think so. I even photos and still seems so. What can it be? Try if I can correct it with the blue filter suggested in another thread.

3. Why some app as "perfectviewer" can access the internal sd and others as "es explorer" not? The room is root by default?

Thanks in advance!

PS: I want to thank all those who share this interesting work. The tablet is revitalized and looks like another!

And thanks to leapinlar for the help :)

And sorry for my English translator :)
[Nook HD, HD+ Android Development] leapinlar:
1. Yes, that happens with the pure installation. It has to do with the 4 partitions on the SD. That is the main reason bokbokan and I developed the hybrid. To get the partitions down to 3.

2. Don't know anything about that.

3. Yes, the ROM is rooted by default. And es explorer can access the internal SD, you just have to configure it right. Other file managers like Root Browser do a better job.
[Nook HD, HD+ Android Development] xdajauser:
hi

Sorry if is not the right thread ...

A few questions:

1. With CM10 rooted in SD I enter CWM recovery to make a backup. This backup is made ​​of CM10 SD or stock? This is a complete backup with all system? No photos, video, apps, etc. .. of course. With this backup I can return to the original stock version?

2. Any CWM can do full backups or system need root? Some time ago I use EMMC-CWM-based recovery v6.0.4.6 to install CM11 and did a backup in the internal memory. That backup is complete? Has a size of 1.5Gb. With this backup I can return to the original stock version?

3. CWM always backs up the entire system? without photos, video, apps, etc ... or it depends if the system is rooted?

4. I want to make and keep a backup of the stock before installing any room in the internal memory. Some guidance?

Thanks in advance!
[Nook HD, HD+ Android Development] leapinlar:
1. If you use the CWM that comes with the SD install, the backup is of the SD installed ROM, regardless of where you store the backup files. It is a special CWM that has been modified to only work on SD installs. And if you tell it to backup, it backs up everything except your media files. However, you can tell it to do a partial backup in the advanced backup menu. If you restore the backup with that CWM, it restores to the SD install.

2. CWM can backup any ROM regardless of whether the ROM is rooted. And yes, that backup you made earlier is complete. But you will need that v6046 CWM to restore it. And it should restore stock to internal memory.

3. Answered in #1.

4. You already said you did it. If you install CM to internal memory, you can back that up after installation too.

The important thing to remember is the ROM that is backed up is determined by the CWM you are using.
[Nook HD, HD+ Android Development] xdajauser:
Thank you very much for the clarification, I'm becoming more sure with this and prefer to understand all process before trying anything :)

Some other questions :o

1. I understand that I have to use every CWM to restore the appropriate backup. The same CWM used for the backup have to use it to restore that backup. Is this correct!

2. If i make a backup with specific CWM before install a room in the internal memory. i can use this backup to restore the room I had before this installation. In this case the stock.

3. When I install a room in the internal memory always install a new CWM recovery (corresponding to CWM used) which replaces the original custom stock recovery installed? And if I go back to the stock room (using the same CWM used to install the room in the internal memory) also becomes the original custom recovery?

4 Why choose CM10.1.3 although CM10.2 or CM11 more recent?

Thank you very much again! :)
[Nook HD, HD+ Android Development] leapinlar:
1. Yes

2. Yes

3. When you install a new ROM the recovery does not change. You have to separately install a different recovery if you want a different one installed. And most users like having CWM on internal memory instead of stock recovery, but it is not mandatory. You can still use the bootable CWM version you made to install the ROM. And when you restore a backup, the recovery does not get restored. It stays the same as it was before the restore.

4. I prefer CM10.1.3 because I think it is the most stable. I suggest you use the dummies guide linked in my signature to install it.
[Nook HD, HD+ Android Development] xdajauser:
hi

Yesterday, after several days using CM10 from SD appeared a warning about possible updates (CM10.1.3, CM10.2 and one RC)

No update at this time, later wanted to return to that screen or option, but I can not find in the settings where updates are shown. Where I can find it?

Is it safe to upgrade in this case, using CM from SD? Or is better to directly install the version you prefer, instead upgrade? If The upgrade is safe, which is more stable? What precautions should I take?

Thank you very much again for all the help
[Nook HD, HD+ Android Development] leapinlar:
If you are running the ROM in this thread on SD, you do not want to use the CM update feature. That tries to install to internal memory and unless you have a CM ROM on internal memory, it messes up.
[Nook HD, HD+ Android Development] xdajauser:
hi,

thanks for the answer, then I do not update this CM in SD.

The next installation I will make it to the internal memory, although the SD works great for my use of the tablet, and I'm still unsure if the stock would recover, because I never did :) But for sure I'll try later :)

Thanks again for your help,

and all those who work and share all this ...
[Nook HD, HD+ Android Development] mikelav456:
Thanks for the response, but the reboot didn't help. Kept getting stuck after cyanoboot menu. I did a full wipe of card and even reset nook stock emmc and going to try again with 5/29 build and report back.
[Nook HD, HD+ Android Development] seblog:
Just curious to know if the secondary partition of the SD card that we use in hybrid mode is accessible also from Stock rom,

in leapinlar development i used to flash the file "NookHD-HDplus-stock-fix-vold-for-dual-boot-hybrid.zip" to be able to read the partition on Stock,

what about similar feature in this rom? thanks
[Nook HD, HD+ Android Development] leapinlar:
The zip should still work with bokbokan's Hybrid.

Sent from my Nook HD+ running CM10 on Hybrid SD
[Nook HD, HD+ Android Development] Delvien:
Changelog?
[Nook HD, HD+ Android Development] leapinlar:
You will find that most of these builds will be upstream changes having nothing to do with specific HD+ mods. If bokbokan adds something for HD+ he generally says what it is in the OP. So look at the CM10.1 cyanogenmod site to see the upstream changes.

Sent from my Nook HD+ running CM10 on Hybrid SD
[Nook HD, HD+ Android Development] ndttung8487:
Very useful! Thanks alot for your hard work
[Nook HD, HD+ Android Development] mikelav456:
So I've got it running again and it will finally boots into cm10.1 properly. My problem now is that Google Play Books keeps crashing each time I start reading a book. Any ideas why that might be and what I can do?
[Nook HD, HD+ Android Development] Delvien:
Try clearing the data on the Google Play app that's giving you trouble
[Nook HD, HD+ Android Development] mikelav456:
Tried that, didn't work, but thanks.

Anyone willing to give it a shot on theirs and see what happens? Otherwise the ROM is running wonderfully!
[Nook HD, HD+ Android Development] Delvien:
Mine works. Running sdcard build.
[Nook HD, HD+ Android Development] mikelav456:
Did you try reading a book, exciting the book, playing around in the app in general? It crashes at random times for me. I appreciate it.

Looks like I'm going to have to go full sd card build then. How stable is it running for you? What type of card?
[Nook HD, HD+ Android Development] Delvien:
Running a class 10 card, huge performance issues, stable, but huge lag spikes when starting apps. I read about 15 pages so far, no crashes.