grub: drivemap
16.3.24 drivemap
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-- Command: drivemap -l|-r|[-s] from_drive to_drive
Without options, map the drive FROM_DRIVE to the drive TO_DRIVE.
This is necessary when you chain-load some operating systems, such
as DOS, if such an OS resides at a non-first drive. For
convenience, any partition suffix on the drive is ignored, so you
can safely use ${root} as a drive specification.
With the '-s' option, perform the reverse mapping as well, swapping
the two drives.
With the '-l' option, list the current mappings.
With the '-r' option, reset all mappings to the default values.
For example:
drivemap -s (hd0) (hd1)
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