1. Join the forums

    The Android Authority community is a great place to connect with other people from around the world who love Android.
    Why you should create an account?
    • Comment on articles and talk in our forums
    • Access to exclusive giveaways & contests
    • Collect Droids that can be redeemed for exclusive Android Authority apparel.
    • Get help from Android experts and other device owners.

    Register or Login.

Nexus 7 (2012) - Reset Factory settings - Error messages

Discussion in 'Nexus Tablets' started by Dan OPKS, Aug 16, 2014.

  1. Dan OPKS

    Dan OPKS New Member

    Messages:
    5
    Likes Received:
    0
    Devices:
    Nexus 7 (2012)
    My tablet is running Kit Kat (4.4.2 ... I think) and hasn't experienced any problems until a couple days ago. After running fine all day, and later when trying to turn it back on, the tablet wouldn't boot up and just stayed in the screen with the dancing colored balls. I tried the soft reboot (multiple times) by holding the power button down for 30 seconds but no change with the boot process. So I shut down the tablet by holding down the power button and the down volume button to go find out what I needed to do.

    My options appeared to be that I could pull the back off the tablet to unplug the battery or do a factory reset. So I chose to try the factory reset process using the manual hold down the power button and down-volume button to get to the menu to select the Recovery mode.

    When I selected the "Recovery mode" and pushed the power button and up-volume button together the Android system recovery menu appeared with the (4) options; reboot system now --- apply update from ADB --- wipe data/factory reset --- wipe cache partition, as expected. But down at the bottom of the screen the following lines were displayed:

    E:failed to mount /cache (Invalid argument)
    E:Can't mount /cache/recovery / log
    E:Can't open /cache/recovery / log
    E:failed to mount / cache (Invalid argument)
    E:Can't mount /cache/recovery/last_log
    E:Can't open /cache/recovery/last_log
    E:failed to mount /cache (Invalid argument)
    E:Can't mount /cache/recovery/last_install
    E:Can't open /cache/recovery/last_install
    E:failed to mount /cache (Invalid argument)​

    I chose to run the "wipe data/factory reset" command and selected the Yes - wipe all user data to begin the process and got the following:

    --Wiping data...
    Formatting /data...
    E:failed to mount /cache (Invalid argument)
    Formatting /cache...
    E:failed to mount /cache (Invalid argument)
    E:Can't mount /cache/recovery / log
    E:Can't open /cache/recovery / log
    E:failed to mount / cache (Invalid argument)
    E:Can't mount /cache/recovery/last_log
    E:Can't open /cache/recovery/last_log
    E:failed to mount /cache (Invalid argument)
    E:Can't mount /cache/recovery/last_install
    E:Can't open /cache/recovery/last_install
    Data wipe complete.
    E:failed to mount /cache (Invalid argument)
    E:Can't mount /cache/recovery / log
    E:Can't open /cache/recovery / log
    E:failed to mount / cache (Invalid argument)
    E:Can't mount /cache/recovery/last_log
    E:Can't open /cache/recovery/last_log
    E:failed to mount /cache (Invalid argument)
    E:Can't mount /cache/recovery/last_install
    E:Can't open /cache/recovery/last_install
    E:failed to mount /cache (Invalid argument)
    So with the displayed results, see above, I couldn't tell exactly if the reset worked or not and when I rebooted the system, the tablet doesn't boot up and the screens go from the Google splash screen to the dancing colored balls back to the Google splash screen then to the dancing balls and etc. about every (10) seconds.

    I also ran this factory reset multiple times and I ran the "wipe cache partition" after the factory reset multiple times too. All with no change, thus I am sending this request for help...

    I don't know what to do next and whether this system is no longer usable, which doesn't appear to be the case but any help would be appreciated.

    Dan
  2. Rob Triggs

    Rob Triggs Moderator Staff Member

    Messages:
    469
    Likes Received:
    166
    Devices:
    Galaxy S2 (PA 4.4), LG G3
  3. Dan OPKS

    Dan OPKS New Member

    Messages:
    5
    Likes Received:
    0
    Devices:
    Nexus 7 (2012)
    Hmmm.. You could try a reinstall of the stock OS.
    https://developers.google.com/android/nexus/images

    Rob,

    Thanks for the recommendation and I have a couple of follow-up questions.

    I haven't rooted the tablet, so would that process be required as part of the reinstall work to the stock OS?

    Since this is a Nexus device made by ASUS, does the replacing the OS need additional stuff directly related to Nexus and ASUS, i.e. proprietary type of drivers and etc.?

    Also, does this take the OS back to OS version 4.1 that came with the tablet or can the Kit Kat ver. 4.4.x be directly reinstalled?

    Lastly, would the Google SDK software be better to use than the "Nexus Root Toolkit"?

    Thanks again for the assistance,
    Dan
  4. phartgejr

    phartgejr New Member

    Messages:
    3
    Likes Received:
    0
    Devices:
    Nexus 7, Samsung Galaxy S 4
    Dan, were you able to solve your issue? I'm having the same problem
  5. Dan OPKS

    Dan OPKS New Member

    Messages:
    5
    Likes Received:
    0
    Devices:
    Nexus 7 (2012)
    Not yet, I tried the Flashboot process using the Android SDK software and it always hangs up on the process with "writing recovery..." So I exited that process and tried the Nexus Root toolkit vs. 1.8.6 and try to use the Advanced Utilities / Custom Recovery (which runs TWRP ... TeamWinRecoveryProgram) the information on this application indicates that the SSD storage drive (partitions) is not mountable. So I am now trying to determine if this tablet is dead due to the SSD memory/storage drive not functioning...but I think I already know the answer as Yep it's dead!

    One thing I had a lot of trouble doing was getting the ASUS Nexus 7 USB drivers for Windows 7-64 to load up and really only got it to recognize the device as an Android Phone, so I don't know if that added to my troubles when just using those drivers?

    Hope this helps and sorry for the late reply/update on my results.
    Dan
  6. ernigeek

    ernigeek New Member

    Messages:
    94
    Likes Received:
    7
    Devices:
    Note 3 SM-N9005; Nexus 7 2012&2013 both 3g/4g; Samsung Galaxy Note 2014 4g
    had the same problem... did you format system and data and cache over fastboot commands?
    That always brought my nexus back!
    Hope i could help you... please do not hesitate to ask for additional help/information!
  7. phartgejr

    phartgejr New Member

    Messages:
    3
    Likes Received:
    0
    Devices:
    Nexus 7, Samsung Galaxy S 4
    Thanks Eringeek. I've been trying to use the fastboot command to do a factory restore. It hasn't been working though. I keep getting the message "error: failed to load 'bootloader-grouper-3.41.img'" even though that file is in the folder I'm working in. Any ideas?
  8. ernigeek

    ernigeek New Member

    Messages:
    94
    Likes Received:
    7
    Devices:
    Note 3 SM-N9005; Nexus 7 2012&2013 both 3g/4g; Samsung Galaxy Note 2014 4g
    Can u post the command you're using?
    and did you try 'fastboot format userdata/system/cache'?
  9. phartgejr

    phartgejr New Member

    Messages:
    3
    Likes Received:
    0
    Devices:
    Nexus 7, Samsung Galaxy S 4
    I used "flash-all". I've also tried "fastboot flash bootloader bootloader-grouper-3.41" and received an error saying "cannot load 'bootloader-grouper-3.41'
  10. ernigeek

    ernigeek New Member

    Messages:
    94
    Likes Received:
    7
    Devices:
    Note 3 SM-N9005; Nexus 7 2012&2013 both 3g/4g; Samsung Galaxy Note 2014 4g
    So you didn't try to format system and data partition manually? Or am I getting this wrong? Sorry if!
    Anyway please be more precise there... good luck!
    Last edited: Sep 6, 2014
  11. ernigeek

    ernigeek New Member

    Messages:
    94
    Likes Received:
    7
    Devices:
    Note 3 SM-N9005; Nexus 7 2012&2013 both 3g/4g; Samsung Galaxy Note 2014 4g
    Any updates here? About your tablet, problem... etc?
Similar Threads: Nexus (2012)
Forum Title Date
Nexus Tablets Nexus 7 best roms + slow charging buxfix Sep 3, 2014
Nexus Tablets nexus 7 replacement screen problem Aug 31, 2014
Nexus Tablets Upgrade to Android 4.4.4 for the Nexus 7 2013 LTE Tablet Aug 26, 2014
Nexus Tablets Using nexus 7 as night clock Aug 13, 2014
Nexus Tablets Nexus 9 Aug 1, 2014

Share This Page