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Multiboot" means that the tool allows multiple systems on the USB stick, as well as a bootloader on the USB flash drive to choose which system to load at boot time. Multiboot is environmental technology since it requires only a single storage device to boot multiple files.
Unlocking the bootloader allows installing and running unsigned code on a device, including user customized software. Operating outside the manufacturer specification might usually result in voiding any warranties and may make the device susceptible to data theft, as the integrity of the operating system (as intended by the manufacturer) can no longer be guaranteed. [1]
The booting process of Android devices starts at the power-on of the SoC (system on a chip) and ends at the visibility of the home screen, or special modes like recovery and fastboot. [ a ] The boot process of devices that run Android is influenced by the firmware design of the SoC manufacturers.
Odin is a utility software program developed and used by Samsung internally which is used to communicate with Samsung devices in Odin mode (also called download mode) through the Thor (protocol). It can be used to flash a custom recovery firmware image (as opposed to the stock recovery firmware image) to a Samsung Android device .
Second-stage boot loaders, such as GNU GRUB, rEFInd, BOOTMGR, Syslinux, and NTLDR, are not themselves operating systems, but are able to load an operating system properly and transfer execution to it; the operating system subsequently initializes itself and may load extra device drivers.
Fastboot is a communication protocol used primarily with Android devices. [1] It is implemented in a command-line interface tool of the same name and as a mode of the bootloader of Android devices. The tool is included with the Android SDK package and used primarily to modify the flash filesystem via a USB connection from a host
Screenshot of Device Manager, containing a Qualcomm device booted in the Emergency Download Mode. The Qualcomm Emergency Download mode, commonly known as Qualcomm EDL mode and officially known as Qualcomm HS-USB QD-Loader 9008 [1] is a feature implemented in the boot ROM of a system on a chip by Qualcomm which can be used to recover bricked smartphones.
In this way, it can provide boot-time diagnostics, configuration code, and device drivers. FCode is also very compact, so that a disk driver may require only one or two kilobytes. Therefore, many of the same I/O cards can be used on Sun systems and Macintoshes that used Open Firmware.