krad kraduk at googlemail.com
Wed Mar 31 11:08:37 UTC 2010

On 31 March 2010 04:53, Fbsd1 <fbsd1 at a1poweruser.com> wrote:

> Dan Nelson wrote:
>> In the last episode (Mar 30), Fbsd1 said:
>>> During the boot process I want to change the device used to boot from.
>>>  From the default 0:ad(0,a)/boot/loader
>>> to 0:da(0,a)/boot/loader forcing the boot to continue from usb stick.
>>> Here is the problem, the bios have no option to boot from USB device.  So
>>> thinking let the bios point to first drive to start the boot process and
>>> have a /boot.config file to redirect to booting from the USB stick.  I am
>>> assuming the '0' zero will mean the first USB device.
>>> Is there any command i can use to verify the single USB stick is the 0
>>> device?
>> If you boot DOS from a floppy, can you see the USB stick as B: or C: ?  If
>> not, then the BIOS probably has no USB support at all, and you'll need to
>> put a small boot partition somewhere on your hard drive to pull the kernel
>> from.  128MB is large enough for a /boot directory, and you can set
>> vfs.root.mountfrom="ufs:/dev/da0s1a" in loader.conf to make it mount its
>> root filesystem from the USB stick (since at that point the kernel has
>> loaded its own USB drivers).
>> If you do see the USB drive from a DOS boot floppy, try entering
>> "1:da(0,a)?" at the boot block prompt and see if it lists the files in
>> your
>> USB filesystem.  If it does, then "1:da(0,a)/boot/loader" should let you
>> boot FreeBSD.
> The USB stick is plugged in before booting. During boot I select option 6
> from Freebsd menu to go direct to the loader prompt. I have ok on command
> line. I enter
>  vfs.root.mountfrom="ufs:/dev/da0s1a" and get "not found" after hitting
> enter key.
> At the ok prompt I enter ? for list of available boot devices and only have
> ad0 listed.
> It seems the da0 device USB stick is not recognized yet.
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try legacy usb in the bios, it may help

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