![failed to read boot.elf failed to read boot.elf](https://sdremix.files.wordpress.com/2015/05/capture_20150503_170123.jpg)
Warning: The syslinux-install_update script sets a default root partition that possibly will not match your particular system. The lib*.c32 library modules and non-core *.c32 modules should match the version of ldlinux.sys installed in the partition. This step and the rest of non-core parts of Syslinux ( /boot/syslinux/*.c32 modules, excluding lib*.c32 and ldlinux.c32) require /boot/syslinux/lib*.c32 (library) modules to be present ( ). If no configuration file is found, you will be dropped to a Syslinux boot: prompt. Stage 4 - Search and Load configuration file - Once Syslinux is fully loaded, it looks for /boot/syslinux/syslinux.cfg (or /boot/syslinux/nf in some cases) and loads it if it is found.The ldlinux.c32 file should be present in every Syslinux installation and should match the version of ldlinux.sys installed in the partition. Stage 3 - Load /boot/syslinux/ldlinux.c32 - The /boot/syslinux/ldlinux.sys will load the /boot/syslinux/ldlinux.c32 (core module) that contains the rest of the core part of syslinux that could not be fit into ldlinux.sys (due to file-size constraints).
![failed to read boot.elf failed to read boot.elf](https://help.univention.com/uploads/default/original/1X/740a2c50b971b0baebe2b6a9892fde95e2e04e9f.png)
#Failed to read boot.elf code
Therefore, in Btrfs the entire ldlinux.sys code is embedded in the space following the VBR and is not installed at /boot/syslinux/ldlinux.sys unlike the case of other filesystems. Note: In the case of Btrfs, the above method will not work since files move around resulting in changing of the sector location of ldlinux.sys. The sector location of /boot/syslinux/ldlinux.sys should not change, otherwise syslinux will not boot. Stage 2 : Part 2 - Execute /boot/syslinux/ldlinux.sys - The VBR will load the rest of /boot/syslinux/ldlinux.sys.Note that ldlinux.sys is not the same as ldlinux.c32. In the case of Syslinux, the VBR boot code is the starting sector of /boot/syslinux/ldlinux.sys which is created by the extlinux -install command. Stage 2 : Part 1 - Execute volume boot record - The Stage 1 MBR boot code executes the Volume Boot Record (VBR) of the /boot partition.Let us assume this is the /boot partition, for example. The Stage 1 MBR boot code looks for the partition that is marked as active (boot flag in MBR disks). Stage 1 : Part 2 - Search active partition.Stage 1 : Part 1 - Load MBR - At boot, the BIOS loads the 440 byte MBR boot code at the start of the disk ( /usr/lib/syslinux/bios/mbr.bin or /usr/lib/syslinux/bios/gptmbr.bin).
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#Failed to read boot.elf windows