Fbsd1 fbsd1 at a1poweruser.com
Wed Mar 31 12:10:39 UTC 2010

krad wrote:
> 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
My bios have no reference to USB at all.

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