Database Users

No operating system installed

I tried to install a new rom after updating TWRP 2.3.0.0. after all was complete it stuck on the boot screen. I then tried with the Nexus Root Toolkit to use a restore from backup. Same problem. I then tried to flash stock and unroot. Same problem. I then tried a number of things through TWRP from backups I had their. Same problem. At present I have no OS and I can only boot into TWRP, turn if off or look at the GOOGLE screen. I have run out of ideas and would appreciate any help offered.

If you have tried everything else (flashing a ROM zip etc.) Then you should flash the factory image from Google.
Don't use the script/batch file as that will wipe your internal storage.
Just flash system and boot.
Sent from my Nexus 7 using xda premium

Sometimes a rom takes a long time to boot for the first time, please be very patient. Also, try wiping everything from /system, and then re install a custom rom from your /sdcard partition. also make sure your roms are for the nexus 7 not galaxy nexus or other similar devices. ONE MORE THING 4.1.2 wont flash with 4.1.1 bootloader.

jmtend said:
I tried to install a new rom after updating TWRP 2.3.0.0. after all was complete it stuck on the boot screen. I then tried with the Nexus Root Toolkit to use a restore from backup. Same problem. I then tried to flash stock and unroot. Same problem. I then tried a number of things through TWRP from backups I had their. Same problem. At present I have no OS and I can only boot into TWRP, turn if off or look at the GOOGLE screen. I have run out of ideas and would appreciate any help offered.
Click to expand...
Click to collapse
There was a bug in TWRP V2.3.0.0 use fastboot to flash V2.3.1.0 and then reflash the rom
Sent from my BAKED Nexus

spaceman860 said:
There was a bug in TWRP V2.3.0.0 use fastboot to flash V2.3.1.0 and then reflash the rom
Sent from my BAKED Nexus
Click to expand...
Click to collapse
Got it working. Thanks all for your suggestions.

jmtend said:
Got it working. Thanks all for your suggestions.
Click to expand...
Click to collapse
How did you fix it? I have no OS and my internal SD card was erased too I don't know how to flash from fastboot

Adb push a ROM.
-Brought to you by Marino's Nexus 7-

AshleyPem28 said:
How did you fix it? I have no OS and my internal SD card was erased too I don't know how to flash from fastboot
Click to expand...
Click to collapse
I know many people hate the talk about toolkits but I was in the same situation and I used Wug's toolkit and it saved me. I downloaded 4.1.2 image directly from Google, as the toolkit only has 4.1.1.
I tried to return to stock on my own and it just went from bad to worse. I would of spent more time trying to fix it on my own but I was on a very tight time constraint. It will unroot your device but it is easy to root again.
Sent from my Nexus 7 using xda app-developers app

Billchen0014 said:
Sometimes a rom takes a long time to boot for the first time, please be very patient. Also, try wiping everything from /system, and then re install a custom rom from your /sdcard partition. also make sure your roms are for the nexus 7 not galaxy nexus or other similar devices. ONE MORE THING 4.1.2 wont flash with 4.1.1 bootloader.
Click to expand...
Click to collapse
THANK YOU the "ONE MORE THING" is all I needed to know for the same problem!

FUBAR

So I tried to update my wife's nook color from cm7 to the latest cm10. I had messed up the partition layout before but she would never let me try to fix it, so I was trying to re partition it to the 1/5 set up. It will not read the SD card, either within the ROM or in recovery. I was able to get the repartition files to what the ROM thinks is the SD card but it won't flash. I tried to reboot into recovery to flash the reformat zip and it is now stuck in cyanoboot. It will not boot into recovery, ROM (CM7), or a boot able SD I made.
What are my options?
Force a factory reset and start over? I've never had luck with the 8 failed to boot method.
Thanks foe the help
Sent from my Nexus 7 using xda premium

bullfrog527 said:
So I tried to update my wife's nook color from cm7 to the latest cm10. I had messed up the partition layout before but she would never let me try to fix it, so I was trying to re partition it to the 1/5 set up. It will not read the SD card, either within the ROM or in recovery. I was able to get the repartition files to what the ROM thinks is the SD card but it won't flash. I tried to reboot into recovery to flash the reformat zip and it is now stuck in cyanoboot. It will not boot into recovery, ROM (CM7), or a boot able SD I made.
What are my options?
Force a factory reset and start over? I've never had luck with the 8 failed to boot method.
Thanks foe the help
Sent from my Nexus 7 using xda premium
Click to expand...
Click to collapse
You need to use my bootable CWM card found in my tips thread linked in my signature. It has been modified to boot in these circumstances. Then go to my partition repair thread and run those zips. It will take you back to 1/5.
Sent from my HD+ running CM10 on SD with XDA Premium

I gotta say, you guys here in the NC forums are the best. Thanks form the quick reply
**edit**
So I got it up and running, just one little issue. It gets stuck at the bootloader screen and it wont boot into recovery. I can get it yo boot into the sd recovery and flash/backup whatever I want, and then reboot system. But it won't reboot recovery from cm10 or cyano boot menu
Sent from my Nexus 7 using xda premium

bullfrog527 said:
I gotta say, you guys here in the NC forums are the best. Thanks form the quick reply
**edit**
So I got it up and running, just one little issue. It gets stuck at the bootloader screen and it wont boot into recovery. I can get it yo boot into the sd recovery and flash/backup whatever I want, and then reboot system. But it won't reboot recovery from cm10 or cyano boot menu
Sent from my Nexus 7 using xda premium
Click to expand...
Click to collapse
Do you mean to boot to internal recovery? There is none there after you did the partition repair. It wiped everything. And if you put a CM rom back on it, that does not put any recovery on it, just the rom. Go to my tips thread linked in my signature and there are several recoveries there to put on emmc. I recommend the 5.5.0.4 version for emmc.
Sent from my HD+ running CM10 on SD with XDA Premium

From the sd card recovery, I've flashed the latest twrp. It won't go there from the bootloader or reboot into the rom
sent from my Liquid Smooth Jellybean MoPho

bullfrog527 said:
From the sd card recovery, I've flashed the latest twrp. It won't go there from the bootloader or reboot into the rom
sent from my Liquid Smooth Jellybean MoPho
Click to expand...
Click to collapse
"or reboot into the rom". What does that mean? You cannot get the new flashed rom to boot? Or did you mean you could not get it to boot to internal recovery from the power menu in CM10? If the latter, try installing a different recovery to internal to see if the twrp install corrupted somehow.
Sent with XDA Premium from my Nook HD+ running CM10 on SD

leapinlar said:
"or reboot into the rom". What does that mean? You cannot get the new flashed rom to boot? Or did you mean you could not get it to boot to internal recovery from the power menu in CM10? If the latter, try installing a different recovery to internal to see if the twrp install corrupted somehow.
Sent with XDA Premium from my Nook HD+ running CM10 on SD
Click to expand...
Click to collapse
I'll try flashing a diff recovery
Sent from my Nexus 7 using xda premium

[Q] No ROM on sd card

I accidentally wiped my sd card and system, data and cache in recovery and I can't install any ROMs because there are none. Since the N4 doesn't have an SD slot i can't even copy a rom zip to that and install it. How do I load ROM files with a Mac? I have a Mac so please take that into consideration. Thanks!

http://forum.xda-developers.com/showthread.php?t=2010312
Sent from my Nexus 4 using xda premium

tykate said:
I accidentally wiped my sd card and system, data and cache in recovery and I can't install any ROMs because there are none. Since the N4 doesn't have an SD slot i can't even copy a rom zip to that and install it. How do I load ROM files with a Mac? I have a Mac so please take that into consideration. Thanks!
Click to expand...
Click to collapse
If you have access to fastboot follow the instructions in the [HOW-TO] How to flash a factory image / return to stock / unlock / root thread.
Essentially you'll be flashing a factory image. Again, as long as your bootloader is intact (fastboot mode) you'll be able to restore the device.

tykate said:
I accidentally wiped my sd card and system, data and cache in recovery and I can't install any ROMs because there are none. Since the N4 doesn't have an SD slot i can't even copy a rom zip to that and install it. How do I load ROM files with a Mac? I have a Mac so please take that into consideration. Thanks!
Click to expand...
Click to collapse
If youve got access to fastboot , flash a custom recovery that supports sideload. You'll use adb to push the zip to recovery and it'll flash it. I was in your position a few hours ago hahaha
Sent from my Nexus 4 using xda premium

comminus said:
Again, as long as your bootloader is intact (fastboot mode) you'll be able to restore the device.
Click to expand...
Click to collapse
Thanks for the help! What do you mean by bootloader is intact? How can it get broken?

I used the nexus toolkit to flash factory image. That made it nice and easy (after I fought with stupid Windows 8 driver problems for an hour :banghead: ).
Sent from an N4 blessed with AOKP and sanctified by Faux123!

It worked, thanks! I'M NOT FLASHING A CUSTOM ROM IN A LOOOOOOOOONG TIME

(Q)(Solved) Need help, how bad did I mess this up?

Had to take the ota to 4.4.2. and Just recently saw the method of breaking the bootloader open again.
So I went through all the steps, and made a backup of what I thought was going to be my failsafe old system. I formatted everything, excluding internal media and external sd at first. went to flash CM11 and failed.
Now going back into TWRP, I set my mind on fixing this. I go and wipe again, and flash my backup only it failed too!
Now I got to the point of another rom: pac rom, followed in TWRP with the gapps.
Everything installs(so it would seem), however I'm now in WARNING BOOTLOADER UNLOCKED bootloop.
I wasn't expecting this much of a hassle and may have rushed, I can get into TWRP and still have access to Fastboot if needed. but a working system is a must, your help is appreciated.

8on3s said:
Had to take the ota to 4.4.2. and Just recently saw the method of breaking the bootloader open again.
So I went through all the steps, and made a backup of what I thought was going to be my failsafe old system. I formatted everything, excluding internal media and external sd at first. went to flash CM11 and failed.
Now going back into TWRP, I set my mind on fixing this. I go and wipe again, and flash my backup only it failed too!
Now I got to the point of another rom: pac rom, followed in TWRP with the gapps.
Everything installs(so it would seem), however I'm now in WARNING BOOTLOADER UNLOCKED bootloop.
I wasn't expecting this much of a hassle and may have rushed, I can get into TWRP and still have access to Fastboot if needed. but a working system is a must, your help is appreciated.
Click to expand...
Click to collapse
You can only use dhacker's test build of CM11 with the new kernel. It is in the Droid RAZR m Android development section. And Pac Rom is not compatible with the new kernel yet. I downgraded and I'm running it now.
Sent from my DROID RAZR M using XDA Premium 4 mobile app

poppers162 said:
You can only use dhacker's test build of CM11 with the new kernel. It is in the Droid RAZR m Android development section. And Pac Rom is not compatible with the new kernel yet. I downgraded and I'm running it now.
Sent from my DROID RAZR M using XDA Premium 4 mobile app
Click to expand...
Click to collapse
And... I shouldn't have been so damn fast to get this thing done . Booting into CM11 as we speak, so aside from this version of CM11 I would need to downgrade to the old kernel system to use the other roms I was trying? And when doing that I would have to use RSD right?
Thanks for the reply!

8on3s said:
And... I shouldn't have been so damn fast to get this thing done . Booting into CM11 as we speak, so aside from this version of CM11 I would need to downgrade to the old kernel system to use the other roms I was trying? And when doing that I would have to use RSD right?
Thanks for the reply!
Click to expand...
Click to collapse
Yes and there is two options when downgrading. There's house of moto(soon to be rsd flasher), or rsd.
Sent from my DROID RAZR M using XDA Premium 4 mobile app

8on3s said:
I formatted everything, excluding internal media and external sd at first. went to flash CM11 and failed.
Now going back into TWRP, I set my mind on fixing this. I go and wipe again, and flash my backup only it failed too!
Click to expand...
Click to collapse
You also need wipe your internal storage to restore your nandroid backup. Backup your internal storage to a computer hdd or your SD card then try these steps to restore back to stock kk
Go to advance wipe
Check all except micro SD card
Wipe
Now Restore you Nandroid backup it will get done.

Prohyper said:
You also need wipe your internal storage to restore your nandroid backup. Backup your internal storage to a computer hdd or your SD card then try these steps to restore back to stock kk
Go to advance wipe
Check all except micro SD card
Wipe
Now Restore you Nandroid backup it will get done.
Click to expand...
Click to collapse
I am going to back up my cm11 and give this a go... For science! Lol thanks for the tip.
Sent from my DROID RAZR M using XDA Premium 4 mobile app

Partition internal memory to retain data after new rom?

Hi
Is it possible to partition the 64gb memory such that my data is retained after every new rom installation?
I came from note 2 and was very confident when formatting the mobile as i can take the sd card out before doing any experiments, but on Nexus 6P i have lost data 3 times as the rom. Was encrypted and custom recovery doesn't enter without formatting user data.
If partitioning is possible please help me.
Sent from my Nexus 6P using XDA-Developers mobile app

You do know if you remove the security pin/finger print that twrp will be able to backup and restore data?
If I'm not mistaken they've also released a new twrp that allows decryption.
Keep in mind that ROMs of different bases may not boot without wiping. Quite honestly since Google's restore function has gotten better I haven't had the need to keep data. Everything from my home screen layout to my app data gets restored after a flash.
Sent from my Nexus 6P using Tapatalk

I really didn't know that. Need to try it. Its been one week without root. First time ever. Its really hard.
Sent from my Nexus 6P using XDA-Developers mobile app

Is the answer 'NO' to the partitioning of internal memory?
Sent from my Nexus 6P using XDA-Developers mobile app

superchilpil said:
You do know if you remove the security pin/finger print that twrp will be able to backup and restore data?
Click to expand...
Click to collapse
I removed all security but TWRP doesnt work. stuck at Splash.

firoz3321 said:
I removed all security but TWRP doesnt work. stuck at Splash.
Click to expand...
Click to collapse
How are you producing this issue? What is your setup? This sounds like you're either using an older version of TWRP or N developer preview. For N Developer Previews, you must be and stay decrypted to use TWRP. Format userdata then install a modified boot.img to remain decrypted. The stock boot forces encryption.
Sent from my Nexus 5X using Tapatalk

superchilpil said:
You do know if you remove the security pin/finger print that twrp will be able to backup and restore data?
If I'm not mistaken they've also released a new twrp that allows decryption.
Keep in mind that ROMs of different bases may not boot without wiping. Quite honestly since Google's restore function has gotten better I haven't had the need to keep data. Everything from my home screen layout to my app data gets restored after a flash.
Sent from my Nexus 6P using Tapatalk
Click to expand...
Click to collapse
SlimSnoopOS said:
How are you producing this issue? What is your setup? This sounds like you're either using an older version of TWRP or N developer preview. For N Developer Previews, you must be and stay decrypted to use TWRP. Format userdata then install a modified boot.img to remain decrypted. The stock boot forces encryption.
Sent from my Nexus 5X using Tapatalk
Click to expand...
Click to collapse
I am using latest TWRP (version 3.x.x.x) with N Preview 3. Diasbled all securities.
rebooted into bootloader and installed TWRP, rebooted to Recovery. Stuck at splash.
Took backup of internal memory and installed modified Boot and now working fine.
taking a backup and restoring takes hours for some reason.

firoz3321 said:
I am using latest TWRP (version 3.x.x.x) with N Preview 3. Diasbled all securities.
rebooted into bootloader and installed TWRP, rebooted to Recovery. Stuck at splash.
Took backup of internal memory and installed modified Boot and now working fine.
taking a backup and restoring takes hours for some reason.
Click to expand...
Click to collapse
Ok. To flash a Marshmallow rom, I believe you need to just flash the matching OS' vendor.img before booting into the Marshmallow rom. Make sure to do your factory reset and system wipe like usual.
If you intend to use N previews each month, you'll likely have to stay decrypted. I do not see a reason for the TWRP team to officially support Android N until it's official release.
Sent from my Nexus 5X using Tapatalk

SlimSnoopOS said:
Ok. To flash a Marshmallow rom, I believe you need to just flash the matching OS' vendor.img before booting into the Marshmallow rom. Make sure to do your factory reset and system wipe like usual.
If you intend to use N previews each month, you'll likely have to stay decrypted. I do not see a reason for the TWRP team to officially support Android N until it's official release.
Sent from my Nexus 5X using Tapatalk
Click to expand...
Click to collapse
I am not blaming anyone. but was only curious if partitioning internal memory was possible. I remember changing the partition tables on Nexus One.

firoz3321 said:
I am not blaming anyone. but was only curious if partitioning internal memory was possible. I remember changing the partition tables on Nexus One.
Click to expand...
Click to collapse
Oh, I wasn't implying that. Hope you don't take it that way. I just meant, if you plan on using N previews, unfortunately this scenario is not likely to change. Just wanted to help you resolve your issue with encryption, TWRP, and switching between Android MM/N.
I don't know about partitioning but maybe it is possible? Maybe someone else can chime with their experience?
Sent from my Nexus 5X using Tapatalk