A UEFI boot entry ID has the format “Bootxxxx” where xxxx is a hexadecimal number that reflects the order in which the boot entries are created.īesides the boot entry ID, the UEFI boot entry has the following fields: It also represents the boot option in several lists, including the BootOrder array, and it is the name of the directory on disk in which the system stores data related to the boot entry, including backup copies of the boot entry. This identifier is assigned when the boot entry is created, and it does not change.
The boot option is a unique identifier for a UEFI boot entry. The UEFI firmware can also effectively generate entries in this boot menu, according to the available network interfaces and possibly the disks attached to the system. The UEFI boot manager can be configured boot entries may be added or removed from the boot menu. The boot manager will attempt to load and boot the OS in an order defined by the persistent variables. The UEFI firmware provides boot management function that can be configured by modifying architecturally defined global variables which are stored in the UPVS EEPROM.
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