Re: [grub] Experiencing difficulties to access USB key files

[Arbiel (gmx)]

Hi Andrei

Le 22/01/2016 17:30, Andrei Borzenkov a écrit :
> 22.01.2016 15:56, Arbiel (gmx) пишет:
> It can also be second floppy supported by controller. What you see
> when no USB stick is plugged in? 
You are right, it is a second unsupplied floppy.
>
>> There are two grub instances in the configuration. One instance is on
>> the hard disk. It is GNU GRUB version 1.99-21ubuntu3.19. The other one
>> is on the USB stick. It is GNU GRUB version 2.02~beta2-9ubuntu1.6
> And which grub is loaded on this system?

GNU GRUB version 1.99-21ubuntu3.19

> But GRUB does not have driver to access this hard disk anymore. Current
> GRUB disables BIOS access as soon as these modules are loaded. If you
> want to test them, please always use "nativedisk" GRUB command which
> attempts to replace device name in $prefix and $root with new one,
> discovered by native drivers.
>
> Old GRUB may not have this command though.
Do you mean that "hd0,msdos1" and so on, are sort of symbols for
information understood by the BIOS that grub own drivers do not understand ?
In short statement, I cannot have grub using its own drivers without
writing a whole new application and I have to drop the idea of accessing
any file on a USB drive if the BIOS itself does not encompass USB drivers.
>
>
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