Database Develop

[Q] failed to mount /data

Hi,
after installing the cm9 nightly 2012/06/29 and had a reboot, the /data folder cannot be mounted anymore.
already tried to install factory-rom with pit-file and re-partition over odin, but the install stops with the error "failed to mount /data".
can anybody help me?
thank you
pehe

Solved:
had to do a full wipe and flash the rom again.

pehe said:
Solved:
had to do a full wipe and flash the rom again.
Click to expand...
Click to collapse
Same thing happened to mine. What do you mean by full wipe?

(SOLVED) :D Bootloop after splashscreen flash

I'm s-off revone method + cid11111111 flashed the mod hboot successfully and a custom splash screen.
fastboot erase cache
Now I've go a boot loop and the spash screen works great.
went into recover to wipe and restore on wipe I get
E:unable to mount '/cache
E: TWFunc: :Copy_cache -- Can't open destination log
E: failed to wipe dalvik cache
looks like I've corrupted data partitions some how? Should I RUU? let me know if you guys can think of a fix?
thanks in advance.
wiping cache in advance for TWRP wasn't working. DOH. all better

subarudroid said:
I'm s-off revone method + cid11111111 flashed the mod hboot successfully and a custom splash screen.
fastboot erase cache
Now I've go a boot loop and the spash screen works great.
went into recover to wipe and restore on wipe I get
E:unable to mount '/cache
E: TWFunc: :Copy_cache -- Can't open destination log
E: failed to wipe dalvik cache
looks like I've corrupted data partitions some how? Should I RUU? let me know if you guys can think of a fix?
thanks in advance.
wiping cache in advance for TWRP wasn't working. DOH. all better
Click to expand...
Click to collapse
How did you fix this?

Advance wipe in twrp said failed.
Some reason standard wipe erased cache and booted fine.
Also did fastboot erase cache before hand and that didn't seem to work.
Sent from my ONE CM10.1

status 7 installation aborted when installing purexz rom

Hi,
i am trying to install this rom http://forum.xda-developers.com/xperia-z/development/rom-ultimate-purexz-v1-t2759467
however, im facing some problems, when i install it it says set perm links, permissions failed (something like that) and status 7, installation aborted.
why does this happen? i mounted my system before installing, followed all the steps, formatted the /system too.
thanks any help would be appreciated.

Tylerwong5566 said:
Hi,
i am trying to install this rom http://forum.xda-developers.com/xperia-z/development/rom-ultimate-purexz-v1-t2759467
however, im facing some problems, when i install it it says set perm links, permissions failed (something like that) and status 7, installation aborted.
why does this happen? i mounted my system before installing, followed all the steps, formatted the /system too.
thanks any help would be appreciated.
Click to expand...
Click to collapse
you need to do a complete wipe before installing rom.
if you have done that try fixing permissions from recovery.

Tylerwong5566 said:
Hi,
i am trying to install this rom http://forum.xda-developers.com/xperia-z/development/rom-ultimate-purexz-v1-t2759467
however, im facing some problems, when i install it it says set perm links, permissions failed (something like that) and status 7, installation aborted.
why does this happen? i mounted my system before installing, followed all the steps, formatted the /system too.
thanks any help would be appreciated.
Click to expand...
Click to collapse
Oh seriously?? You should ask this into the ROM thread man!
UNmount system and flash
Tapatalk'ed from my Xperia™ Z (C6602) running Dirty Unicorns ROM!

tried that did not work too. i wiped the phone, formatted system, mount /unmount system, and set perm still fails status 7 installation aborted.
any one know how?

Tylerwong5566 said:
tried that did not work too. i wiped the phone, formatted system, mount /unmount system, and set perm still fails status 7 installation aborted.
any one know how?
Click to expand...
Click to collapse
Try this
Download zip(you have already done that)
copy the zip to INTERNAL MEMORY
reboot to recovery
Format system
format cache
format dalvik cache
format data(not internal sd)
and then proceed with installation
would recommend to remove ext sd while doing the procedure
wish you luck:good:

androidtweaker1 said:
Try this
Download zip(you have already done that)
copy the zip to INTERNAL MEMORY
reboot to recovery
Format system
format cache
format dalvik cache
format data(not internal sd)
and then proceed with installation
would recommend to remove ext sd while doing the procedure
wish you luck:good:
Click to expand...
Click to collapse
tried that did not work. back to square one. anyway some info about my phone, rooted with towel root, locked bootloader and installed xzdualrecovery. any help please?

Did you try both recoveries that you have? If it fails in TWRP, then try Philz or vice versa.
Sent from my C6603 using Tapatalk

Tylerwong5566 said:
tried that did not work. back to square one. anyway some info about my phone, rooted with towel root, locked bootloader and installed xzdualrecovery. any help please?
Click to expand...
Click to collapse
So reinstall the recovery. That should work.
Tapatalk'd from my Xperia™Z (C6602) running Dirty Unicorns ROM!

androidtweaker1 said:
Try this
Download zip(you have already done that)
copy the zip to INTERNAL MEMORY
reboot to recovery
Format system
format cache
format dalvik cache
format data(not internal sd)
and then proceed with installation
would recommend to remove ext sd while doing the procedure
wish you luck:good:
Click to expand...
Click to collapse
androidfreak70 said:
So reinstall the recovery. That should work.
Tapatalk'd from my Xperia™Z (C6602) running Dirty Unicorns ROM!
Click to expand...
Click to collapse
manage to install but it does not boot up stuck at black screen. iused twrp did not mount system. it worked.
regards

Flash using philz recovery everything worked fine wid me after status 7 in twrp and cwm
Sent from my C6603 using XDA Free mobile app

Tylerwong5566 said:
manage to install but it does not boot up stuck at black screen. iused twrp did not mount system. it worked.
regards
Click to expand...
Click to collapse
i solved it. thanks. flashed the blackxz rom instead, used twrp recovery, mount and unmounted system and then continued with normal installation.
works well.

NEED URGENT HELP,NO OS ,bootloops and unable to mount /data ,/cache, 0 mb internal

i was using Minimal Os V3.0 for one month ,But today morning my automatically shutdown and lags ,so i decided to install new rom and wipe data,but i got error while wiping data and cache in TWRP "unable to mount /data,/ cache..." also when i connect my phone to PC ,there is no Internal memory shown there also In TWRP recovery INTERNAL memory (0 mb). Please HELP me its Urgent.

vaibhav1211995 said:
i was using Minimal Os V3.0 for one month ,But today morning my automatically shutdown and lags ,so i decided to install new rom and wipe data,but i got error while wiping data and cache in TWRP "unable to mount /data,/ cache..." also when i connect my phone to PC ,there is no Internal memory shown there also In TWRP recovery INTERNAL memory (0 mb). Please HELP me its Urgent.
Click to expand...
Click to collapse
Do this-
In twrp, under wipe, select advanced wipe. Check data and tap on repair or change file system. Then repair the file system.(This will wipe your internal storage!!) If that doesn't work, then under wipe, select format data.(This will also wipe internal storage)
See if this works.. If it works for data, then do the same for cache and any other partitions you have problems with. Wipe system also..
Sent from my Moto G 2014 using Tapatalk

Vidhanth said:
Do this-
In twrp, under wipe, select advanced wipe. Check data and tap on repair or change file system. Then repair the file system.(This will wipe your internal storage!!) If that doesn't work, then under wipe, select format data.(This will also wipe internal storage)
See if this works.. If it works for data, then do the same for cache and any other partitions you have problems with. Wipe system also..
Thanks for replying ,hey,i have done what you said ,and it partially worked for me ,now i was not getting error and installed rom but now i am not able access the TWRP recovery ,installed all version one by one nothing works ,TWRP screen logo fluctuates ,Please help
Click to expand...
Click to collapse

Flash the original firmware of your model using fastboot and then reinstall TWRP and your new ROM I had the same problem a month ago with another ROM and that works for me! Sorry for my bad english!
Sent from my Moto G 2014 using XDA Free mobile app

you can also boot temporary recovery on bootloader
just type in adb: fastboot boot NameOfTheRecoveryFile.img
it'll get you straight away

Huawei p9 format Data from ext4 to f2fs fail

hi
i have a problem with formatting Data in twrp recovery on huawei P9 eva-L09C432B182
https://dl.dropboxusercontent.com/u/67361401/IMG_20170309_174811.jpg
ive tried this ROM:
https://forum.xda-developers.com/p9/development/rom-huawei-p9-newworld-7-tecalote-t3543296
and it installs, but i get message after boot:
https://dl.dropboxusercontent.com/u/67361401/IMG_20170309_180017.jpg
i can actually see navi bar for a sec and volume buttons still work(can set alarm and sound loudness)
and here is install image of Rom:
https://dl.dropboxusercontent.com/u/67361401/IMG_20170309_175844.jpg
only error is mount: failed to mount /dev/block/dm-0 at /dat: No such file or directory
so i can only use twrp recovery and fastboot to fix this.
mkfs.f2fs -t 0 /dev/block/mmcblk0p42 process ended with error: 255
unable to wipe Data.
error changing file system.
every other is good for format(System and Cache) to f2fs and ext4 just Data folder has problem with format but wipe works :crying:

Are you using the last version of TWRP? Twrp 3.0.3.0

henryco11 said:
Are you using the last version of TWRP? Twrp 3.0.3.0
Click to expand...
Click to collapse
no i use 3.0.2.0
i think 3.0.3.0 is only for updated huwei with nougat and EMUI5?

Why you decrypted it?
It should work normal after you reset it.

dkionline said:
Why you decrypted it?
It should work normal after you reset it.
Click to expand...
Click to collapse
reset what excatly? factory reset works but Data is in ext4 format. i can wipe it but cant format it.
what if i erase this mmblck0p42 file and then flash twrp in fastboot will the file be reinstalled or will it be after i flash ROM in recovery again?
i made a mistake by formatting it in first place from f2fs to ext4 but before even factory reset didnt work, now it works and only think is left is this encryption error.

jure482 said:
hi
i have a problem with formatting Data in twrp recovery on huawei P9 eva-L09C432B182
https://dl.dropboxusercontent.com/u/67361401/IMG_20170309_174811.jpg
ive tried this ROM:
https://forum.xda-developers.com/p9/development/rom-huawei-p9-newworld-7-tecalote-t3543296
and it installs, but i get message after boot:
https://dl.dropboxusercontent.com/u/67361401/IMG_20170309_180017.jpg
i can actually see navi bar for a sec and volume buttons still work(can set alarm and sound loudness)
and here is install image of Rom:
https://dl.dropboxusercontent.com/u/67361401/IMG_20170309_175844.jpg
only error is mount: failed to mount /dev/block/dm-0 at /dat: No such file or directory
so i can only use twrp recovery and fastboot to fix this.
mkfs.f2fs -t 0 /dev/block/mmcblk0p42 process ended with error: 255
unable to wipe Data.
error changing file system.
every other is good for format(System and Cache) to f2fs and ext4 just Data folder has problem with format but wipe works :crying:
Click to expand...
Click to collapse
Why is your data partition ext4?
Normally it is on each p9 device f2fs.
This can only occur if you were on Nougat between and had installed the TWRP-n which has no Decryption Support and if you had by yourself formated data with this TWRP to ext4.
To install NewWorld Rom you must be on Marshmallow Firmware (because of Android 6 Bootloader) and your data partition must be f2fs.
In the meantime there's a new TWRP for Android 7, which has already Decryption Support.
But you cannot use this TWRP for installing NewWorld. You must have the one, which I have linked in my OP.
On which Firmware or Rom have you been, before you tried to install NewWorld?
If you were on Nougat, NewWorld could not flashed, cause you must be on Marshmallow.
Please answer my questions that I can realize in which situation you are.

i have Marshmallow Firmware and yes i formatted data to ext4 myself
the problem occured when i wanted to get nougat but OTA update failed but it booted back into 6.0 normally just root didnt work so i went in TWRP and flashed supersu 2.79 which i had before, then i was stuck in bootloop, manged to get to fastboot but Hisuite says no update packeg for this phone. i flashed back stock recovery and tryed to factory reset but didnt work, flashed twrp back and factory reset then it said data format error so i went and changed it to ext4 after factory reset worked but i cant put it back to f2fs.
aldo i wiped all cache, dalvik/ARTcache, Data, internal storage and system

jure482 said:
i have Marshmallow Firmware and yes i formatted data to ext4 myself
the problem occured when i wanted to get nougat but OTA update failed but it booted back into 6.0 normally just root didnt work so i went in TWRP and flashed supersu 2.79 which i had before, then i was stuck in bootloop, manged to get to fastboot but Hisuite says no update packeg for this phone. i flashed back stock recovery and tryed to factory reset but didnt work, flashed twrp back and factory reset then it said data format error so i went and changed it to ext4 after factory reset worked but i cant put it back to f2fs.
aldo i wiped all cache, dalvik/ARTcache, Data, internal storage and system
Click to expand...
Click to collapse
Okay, you are now on Stock Marshmallow (which version?) and you maked factory reset after formatting data to ext4
Which phone EVA model to you have?
It is recommended to flash Stock Recovery with adb and flash latest official Marshmallow Full Firmware once again (downloaded and unzipped) with 3 Button (Force Update) from the folder dload on your phone (update.app and if present meta-inf must be in this folder only) Force Upgrade to Marshmallow Firmware should solve your problem (Bootloader get closed, data should be formatted to f2fs automatically)

Tecalote said:
Okay, you are now on Stock Marshmallow (which version?) and you maked factory reset after formatting data to ext4
Which phone EVA model to you have?
It is recommended to flash Stock Recovery with adb and flash latest official Marshmallow Full Firmware once again (downloaded and unzipped) with 3 Button (Force Update) from the folder dload on your phone (update.app and if present meta-inf must be in this folder only) Force Upgrade to Marshmallow Firmware should solve your problem (Bootloader get closed, data should be formatted to f2fs automatically)
Click to expand...
Click to collapse
thanks soo much i did what you said on pm. went to bootloader and flashed your twrp then wiped again arpcache, cache, system, data, reboot to twrp then installed your ROM which still said that mount dev-0 error but i still rebotted and bam it booted longer with this very nice animation you have and showed emui and now im at select language page!
Flashing your twrp in bootloader fix the problem and formatted Data to f2fs thank you again.
also i used command recovery --wipe_data --set_filesystem_encryption=off before all above to make sure ecryption is off not broken.
im now on home screen it looks nice just 3 navigation buttons on bottom look smaller then i had before, thanks again.