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Re: Problem with boot from USB drive
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From: |
Andrei Borzenkov |
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Subject: |
Re: Problem with boot from USB drive |
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Date: |
Thu, 28 Jan 2016 16:48:59 +0300 |
On Thu, Jan 28, 2016 at 4:24 PM, Michael Heseltine
<address@hidden> wrote:
>
>> error hd1: cannot get C/H/S values.
>
Does disk exist? Does your BIOS support USB devices in the first
place? Please show "ls -l" output in GRUB CLI.
> I have googled a bit and found the recommendation load a few more modules:
>
> insmod usbms
> insmod uhci
> insmod ehci
> insmod ohci
>
> Of those, adding "usbms" und "ehci" changes nothing. If I add "uhci" or
> "ohci", I get a different error message:
>
>> error: disk 'hd0,msdos1' not found.
>> error: disk 'hd1' not found.
>
> This sounds to me like he not only still doesn't find the USB drive, but now
> also can't find its own boot partition (the grub files are on the first
> partition of the internal harddisk) anymore. :-(
>
That's correct. These drivers compete with BIOS for hardware access so
as soon as you load them access via BIOS is disabled.