Cant Install Error in mount_flash

  • I am trying to install latest librelelec generic to my new intel appollo lake NUC.
    I tried on both SD card and usb but I still get the error in mount_flash when trying to boot installer.

    Any suggestions?

    using UEFI boot.


  • Which NUC exactly is it?
    Does have a SSD/HDD on board?

    One odd possibility: clean your USB/SD's with this tool, do a full format on all of them.
    Perhaps the boot sector on the USB/SD is 'dirty'.

    Its the new Apollo Lake NUC with preinstalled Windows 10.
    No SSD or HD.
    Im trying to install from 1 usb to another usb but usb installer wont start.

    Tried the clean.
    its not the stick as I get same error on a SD card.

  • Go to your BIOS/UEFI, disable Secure Boot and delete all security keys if installed.
    When you say latest LibreELEC generic is it 7.95.1 ?
    If so try this;
    After using the “LibreELEC USB-SD Creator” to prepare your USB stick, go back to File Explorer verify that the size of it is 511MB then right-click your USB stick and rename it manually to exactly this "LIBREELEC" without quotes(even if it's already named that) then right-click again select "Properties" and do the same there in the General tab.
    Try to install again.

    Edited once, last by vitorp07 (January 24, 2017 at 10:22 PM).


  • Go to your BIOS/UEFI, disable Secure Boot and delete all security keys if installed.
    When you say latest LibreELEC generic is it 7.95.1 ?
    If so try this;
    After using the “LibreELEC USB-SD Creator” to prepare your USB stick, go back to File Explorer verify that the size of it is 511MB then right-click your USB stick and rename it manually to exactly this "LIBREELEC" without quotes(even if it's already named that) then right-click again select "Properties" and do the same there in the General tab.
    Try to install again.

    Secureboot was disabled already when I bought it.

    Yes I tried both 7.951 and 7.90.

    Tried that no difference.
    Size of partition is 511 and around 300mb is used.


  • Secureboot was disabled already when I bought it.

    Yes I tried both 7.951 and 7.90.

    Tried that no difference.
    Size of partition is 511 and around 300mb is used.

    Did you try what i suggested and renamed the Volume label?
    Also did you try running "live" from the USB stick, does it work?

    Edited once, last by vitorp07 (January 24, 2017 at 10:34 PM).

  • Edit the "syslinux.cfg" file in the root of the USB stick like this below, it worked here.


  • How did you create the USB? Check that the filesystem with SYSTEM/KERNEL present is labelled "System".

    I used both the LE USB Creator and Win32DiskImager.

    On both it dont add a label to the 2nd partition, the partition with EFI folder is called LIBREELEC.
    I tried changing the LABEL option in syslinux to say LIBREELEC but same error.

    Edited once, last by Nekromantik (January 25, 2017 at 10:26 AM).