My Nexus 10 boots forever. I did (according to the cm-wiki):

  1. Root it
  2. Flash Clockworkmod-Recovery with fastboot
  3. Flash CM11 with sideload
  4. Flash Boot.img with fastboot

Now my Nexus 10 is stuck at the boot animation.

Any ideas?

I tried to wipe dalvik cache in advanced Menu in cwm. When I afterwards choose "show log" I get the following error:

mount: mounting /dev/block/platform/dw_mmc.0/by-name/userdata on /data failed: Invalid arguemnt W:failed to mount /dev/block/platform/dw_mmc.0/by-name/userdata (File exists)

May theres ist the problem?

I flashed stock rom, and this works like a charm. Then I tried to install cm again and twrp. But, twrp tells me, that /data can't be mounted. I tried in twrp (Advanced, Terminal Command):

# mount /data mount: mounting /dev/block/mmcblk0p9 on /data failed: Invalid argument

3 Answers 3


Boot into recovery and get a shell (e.g. adb shell on the PC connected via USB). Then format the userdata partition:

mke2fs -t ext4 /dev/block/platform/dw_mmc.0/by-name/userdata

Afterwards, simply reboot and it should work fine.

The reason why this is necessary is simply (thanks to @utkanos in #cyanogenmod for explaining it): When unlocking the bootloader using fastboot oem unlock it erases all data but doesn't create a proper filesystem.

  • Solved my issue with Nexus10. Could not wipe the device, so was stuck in bootloop. Did not know it was due to this.
    – twDuke
    Commented Nov 17, 2014 at 16:59

Try to enter cwm recovery and do a full wipe factory reset. Wipe both dalvik cache under advanced section and cache.

  • @Tobias If you have any important information on yiur phone make a backup then download and flash that rom via zip file (if there is an option) and restore your data
    – user65089
    Commented May 11, 2014 at 13:30
  • @Tobias the log says that system can't mount a partition where the installation is located so there is a serious problem
    – user65089
    Commented May 11, 2014 at 13:31
  • I don't have any important data... There's no worry.
    – Tobias
    Commented May 11, 2014 at 13:35
  • I flashed the stock rom again, and this worked like a charm. I think, this is a good sign...
    – Tobias
    Commented May 11, 2014 at 13:36
  • Good now do you want a cm11 rom?
    – user65089
    Commented May 11, 2014 at 13:37

I found a solution. I had to format the partition /dev/block/mmcblk0p9 by hand (with twrp).

I can't remember the command exactly - but more or less it was:

mkfs -t ext4 /dev/block/mmcblk0p9

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .