N7 stuck on bootloader, no cache, cant unlock

Discussion in 'Android Tech Support' started by stevieag, Dec 29, 2013.

  1. stevieag

    stevieag New Member

    Joined:
    Dec 29, 2013
    Messages:
    2
    Likes Received:
    0
    Trophy Points:
    1
    Ratings:
    +0
    hi,

    my bootloader will not unlock?

    I had a few issues with random shut downs and was getting concerned.

    After searches found a reset may help

    got into bootloader
    into recovery and tried a factory reset

    the unit stopped at wiping /data
    A press of buttons changed this to the android dude with a swirling tummy. Left this to no joy

    Started again. this time cleared cache. This had the same error. (just sat there)

    Then i got an error indicated the E:failed to mount /cache (invalid argument)

    So, i decided to look a bit further and unlocking the unit seemed to be the only way i was going to fix this....
    problem is it wont let me unlock my bootloader

    i get
    C:\google>fastboot oem unlock
    ...
    (bootloader) erasing userdata...
    (bootloader) erasing userdata done
    (bootloader) erasing cache...
    (bootloader) erasing cache done
    (bootloader) unlocking...
    FAILED (remote: (Unknown error code))
    finished. total time: 1.614s

    the unit is still locked

    i now have a nexus 7 that will boot into bootloader, recovery
    so i can adb sideload,

    sideload gives

    E:failed to mount /cache (invalid argument)
    E:failed to set up expected mounts for install; aborting
    installation aborted
    E:failed to mount /cache (invalid argument)
    E:cant mount /cache/recovery/log
    E:cant open /cache/ recovery/log
    E:failed to mount /cache (invalid argument)
    E:cant mount /cache/recovery/last_log
    E:cant open /cache/recovery/last_log
    E:failed to mount /cache (invalid argument)
    E:cant mount /cache/recovery/last_install
    E:cant open /cache/recovery/last_install
    E:failed to mount /cache (invalid argument)
    E:cant mount /cache/recovery/log
    E:cant open /cache/ recovery/log
    E:failed to mount /cache (invalid argument)
    E:cant mount /cache/recovery/last_log
    E:cant open /cache/recovery/last_log
    E:failed to mount /cache (invalid argument)
    E:cant mount /cache/recovery/last_install
    E:cant open /cache/recovery/last_install

    can get to fastboot

    i have tried flash from fastboot etc

    i have tried formatting the cache to rebuild???

    here is what i got

    C:\google>fastboot erase cache
    erasing 'cache'...
    OKAY [ 3.071s]
    finished. total time: 3.076s

    C:\google>fastboot format cache
    formatting 'cache' partition...
    Creating filesystem with parameters:
    Size: 464519168
    Block size: 4096
    Blocks per group: 32768
    Inodes per group: 7088
    Inode size: 256
    Journal blocks: 1772
    Label:
    Blocks: 113408
    Block groups: 4
    Reserved block group size: 31
    Created filesystem with 11/28352 inodes and 3654/113408 blocks
    sending 'cache' (9052 KB)...
    FAILED (remote: Bootloader is locked.)
    finished. total time: 0.304s

    is there anyway to rebuild?

    pray you can help
     
  2. CJM

    CJM Super Moderator
    Staff Member Rescue Squad Premium Member

    Joined:
    Sep 12, 2010
    Messages:
    10,593
    Likes Received:
    1,668
    Trophy Points:
    558
    Location:
    Mississippi Gulf Coast
    Ratings:
    +1,810
    Current Phone Model:
    Nexus 6
    Twitter:
    https://twitter.com/Corey
    Have you tried a different usb port? It may sound silly, but I've seen that to be the cause of problems before.

    Also, here's our sister site dedicated to the Nexus line Nexus 7 Forum
     
  3. stevieag

    stevieag New Member

    Joined:
    Dec 29, 2013
    Messages:
    2
    Likes Received:
    0
    Trophy Points:
    1
    Ratings:
    +0
    Thanks, tried differing USB cables and ports without joy

    i have now registered on your sister site, thanks
     
Search tags for this page
(bootloader) unlocking... failed (remote: (unknown error cod
,

failed remote bootloader is locked

,

fastboot oem unlock failed nexus 7 remote unknown error

,
nexus 7 2 failed to mount cache
,
nexus 7 2013 failed to mount cache
,
nexus 7 failed to mount /cache
,
nexus 7 failed to mount after wiping data
,
nexus 7 failed to mount cache
,
nexus 7 fastboot unlock erasing userdata
,
nexus 7 unlock unknown error