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[Q] failed to mount /data

Hi,
My Acer Iconia A500 is in serious trouble.
I use TWRP v2.1.3 and Bootloader Skrilax_CZ's V8.
My problem started with a loop at startup of Android, not passing the cyanogenmod load screen.
I had no backup to restore.
Used an external memory card to install android rom again.
But I can not mount / data.
In the TWRP screen:
- Install / sdcard/cm-100201211140-UNOFFICIAL-a500.zip ...
Fiding update package ...
Opening update package ...
Installing update ...
* Verifying filesystem ....
* Verifying partition sizes ...
E: Ubable to mount / data
E: Failed to mount / data (Invalid argument)
E: Failed to mount / data (Invalid argument)
The option to mount also can not check the option: mount data.
Could anyone help me?

[Q] N7 [F2FS] stuck at Google Logo BL Avail.

Hello guys, i have a problem with my N7 2012 WIFI Grouper, i flashed a F2FS Rom with F2FS TWRP 2.7.0.0 Rec. and every worked fine for 2 days, till this morning, i powered it this moring up and it stuck at the Google Logo. Access to Recovery is not possible, but i can boot it via Fastboot ... all Data is Lost even on the Internal SDCARD but i dont find any Mount SDCARD option, that i can copy the Data on it.
I hope that you'll can help me.
Here is some LOG of TWRP:
Erimary block device '/dev/block/platform/sdhci-tegra.3/by-name/UDA' for mount point /data' is not present!
E: Unable to mount '/data
E: Unable to recreate '/data/media folder.
E: Unable to find partition size for '/misc'
E: Unable to find partition size for '/boot'
E: Unable to find partition size for '/recovery'
E: Unable to find partition size for '/staging'
Updating partition details...
E: Unable to mount '/system'
E: Unable to mount '/cache'
E: Unable to mount '/data'
E: Unable to mount internal storage.
E: Unable to mount /data/media during GUI startup
E: Unable to mount '/cache'
Full SELinux support is present
E: Unable to mount '/cache'
E: Unable to set emmc bootloader message.
E: Unable to mount '/cache'
E: Unable to mount '/data/media/TWRP/.twrps when trype to read settings file.
Click to expand...
Click to collapse

It looks like you have a NAND failure. There seems to be an epidemic of these NAND and corrupted bootloader failures in the first generation Nexus 7s as they approach two years of use. I found a used $50 32GB motherboard (or $35 16GB motherboard) was far more cost effective than Asus' $213 repair estimate.

How to format /data manually using TWRP terminal

When i flash stock firmware using Odin. I got following error in recovery (first time only). Mobile do boot loop on Samsung logo. Someone tell me to format your /data partition manually from terminal. How can i format /data partition from TWRP Terminal Command.
E: failed to mount /data (invalid argument)
can't mount '/data' (invalid argument)
E: failed to mount /data (invalid argument)
can't mount /data/log/recovery_log.txt
E: failed to mount /data (invalid argument)
E: can't mount /data/log/emmc_checksum_log.txt
Sorry for Bad English

TalhaMoazSarwar said:
When i flash stock firmware using Odin. I got following error in recovery (first time only). Mobile do boot loop on Samsung logo. Someone tell me to format your /data partition manually from terminal. How can i format /data partition from TWRP Terminal Command.
E: failed to mount /data (invalid argument)
can't mount '/data' (invalid argument)
E: failed to mount /data (invalid argument)
can't mount /data/log/recovery_log.txt
E: failed to mount /data (invalid argument)
E: can't mount /data/log/emmc_checksum_log.txt
Sorry for Bad English
Click to expand...
Click to collapse
do the following steps mentioned in the post
http://forum.xda-developers.com/showpost.php?p=58947931&postcount=4

grohitsurana said:
do the following steps mentioned in the post
http://forum.xda-developers.com/showpost.php?p=58947931&postcount=4
Click to expand...
Click to collapse
Still same error that i mentioned above :crying::crying::crying:

before
TalhaMoazSarwar said:
Still same error that i mentioned above :crying::crying::crying:
Click to expand...
Click to collapse
1.after flashing you should reboot to recovery mode it will install recovery after that it will show g7102 logo that time imedietely remove the battery
2.then again reboot into recovery & click data factory reset & then reboot...
note:
1.try flashing with different usb cable because dirty flash can also cause this problem
2.and before this what was your stock rom before on your phone 4.4.2 kitkat ver or jellybean ver
3. and be sure you are flashing the correct rom of your region as per your phone (for example indian ver of stock rom are of two kinds one is inu version & the other is ins version) so pls check which version of the rom is supported by your region & your phone

failed-remote-cant-flash-unsigned-image

When i want flash file by fastboot with this command : fastboot flash boot <file.img>
this error pop up :faiLED (remote: can't flash unsigned image)
Phone: Asus zenfone 2 Laser ZE500KL
what should I do?
When i hold power button + volume down This gives me the asus logo and nothing more ( The same is turned on for normal )
Please help and quick response.

You have to unlock the bootloader first

andrehsu said:
You have to unlock the bootloader first
Click to expand...
Click to collapse
How I can unlock bootloader, if I can't access to system?

http://forum.xda-developers.com/zen...ent/recovery-twrp-3-0-2-0-unofficial-t3377991
or http://forum.xda-developers.com/zen...guide-marshmallow-root-guide-ze500kl-t3380461
Use search ffs

andrehsu said:
http://forum.xda-developers.com/zen...ent/recovery-twrp-3-0-2-0-unofficial-t3377991
or http://forum.xda-developers.com/zen...guide-marshmallow-root-guide-ze500kl-t3380461
Use search ffs
Click to expand...
Click to collapse
Ok, I have access to recovery, so how I can unlock bootloader now?

Please read the guides provided in the links

andrehsu said:
Please read the guides provided in the links
Click to expand...
Click to collapse
When I flashed bootloader unlocker by SD card I haved the following bugs:
HTML:
Failed to mount '/cache' (Invalid argument)
Updating partition details ...
Failed to mount '/cache' (Invalid argument)
...done
Failed to mount '/cache' (Invalid argument)
FullSELinux support is present.
Failed to mount '/cache' (Invalid argument)
Failed to mount '/cache' (Invalid argument)
MTP Enabeld
Installing zip file ' /sdcard1/Android/ZE500KL_BootloaderUnlock.zip'
Checking for MD5 file...
Skipping MD5 check : no MD5 file found
-supported device model detected!
-Magic is set. skip....
-unlocking bootloader....
-patching tampered bootloader....
-SSN correct ,skip....
-Done!
Failed to mount '/cache' (Invalid argument)
....done

hey men . we have same problen can you help me my asus ze500kl only boot on asus logo and no recovery . pls help me

[HELP] Cant mount /data /system /cache, Unknown partition 'osip' .

Model: T00F
Intel z250 1.6 Ghz
Suddenly my apps started closing in custom rom (montana rom) like contacts,camera etc.
So i tried to restarted my phone but it stuck on boot animation.
Then i tried to wipe and flash this rom again from TWRP 3.1 but it showed me error:-
E:Unkown File System: 'osip'
E:Unable to find partition size for '/misc'
E:Unable to set bootloader message.
Could not mount /data and unable to find crypto footer.
Failed to mount '/data' (Invalid argument)
Unable to recreate /data/media folder.
Failed to mount '/system' (Invalid argument)
Failed to mount '/cache' (Invalid argument)
Failed to mount '/data' (Invalid argument)
Now i cant wipe, change file system, install and mount.
Here's other things i've tried:
1.) Re-partition my Android
error: /parted: line 1: syntax error: unexpected word (expecting ")")
2.) Debrick Asus Zenfoen 5 with no fastboot, no recovery, and ruined partitions.....
(https://forum.xda-developers.com/zenfone-5/help/debrick-asus-zenfoen-5-fastboot-t3377455/page1)
error: debrick.bat didnt worked properly.
cannot adb sideload my firmware.. same error (unable to mount /cache)
3.)Hard Bricked Zenfone Unbrick (Last method to try)
https://forum.xda-developers.com/android/development/hard-bricked-zenfone-unbrick-method-to-t3131911
error: failure FW + OS cannot be downloaded
PLEASE HELP ME...
I cant afford new phone this time.

yes I gived like error like too
FW + OS cannot be downloaded