grub-mkdevicemap
create GRUB device mapping file
TLDR
Generate device map
$ sudo grub-mkdevicemap
Specify output file$ sudo grub-mkdevicemap -m /boot/grub/device.map
Verbose output$ sudo grub-mkdevicemap -v
SYNOPSIS
grub-mkdevicemap [options]
DESCRIPTION
grub-mkdevicemap creates a device map file for GRUB that maps BIOS drive numbers to Linux device names. The device map helps GRUB understand disk ordering.
The map is automatically generated but can be customized for special configurations where disk ordering needs to be explicitly controlled.
PARAMETERS
-m, --device-map FILE
Output device map file.-n, --no-floppy
Skip floppy detection.-v, --verbose
Verbose mode.--help
Display help information.
CAVEATS
Deprecated in GRUB 2. May be needed for legacy setups. Disk order detection may vary.
HISTORY
grub-mkdevicemap was developed as part of GNU GRUB for device mapping between BIOS and Linux.
SEE ALSO
grub-install(8), grub-mkconfig(8), grub(8)