Re: [FAQ] FBSD on a USB stick

On Fri, Mar 5, 2010 at 5:16 AM, Giovanni Trematerra
<giovanni.trematerra_at_gmail.com> wrote:
> Instead of this patch people can use kern.cam.boot_delay
> Just set a delay in ms.
> That works on 8-STABLE too.
>
> On Mon, Mar 1, 2010 at 5:31 PM, Hans Petter Selasky <hselasky_at_c2i.net> wrote:
>> Hi,
>>
>> Sometimes the USB sticks won't get detected in time. You can fix this by using
>> the following simple quick and dirty patch.
>>
>> --HPS
>>
>> ==================================================================
>> --- sys/kern/vfs_mount.c        (revision 204512)
>> +++ sys/kern/vfs_mount.c        (local)
>> _at__at_ -1656,6 +1656,8 _at__at_
>>            UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
>>        devfs_first();
>>
>> +repeat:
>> +
>>        /*
>>         * We are booted with instructions to prompt for the root filesystem.
>>         */
>> _at__at_ -1725,9 +1727,10 _at__at_
>>         * Everything so far has failed, prompt on the console if we haven't
>>         * already tried that.
>>         */
>> -       if (!asked)
>> -               if (!vfs_mountroot_ask())
>> -                       goto mounted;
>> +       if (!asked) {
>> +               pause("WDISK", 1*hz);
>> +               goto repeat;
>> +       }
>>
>>        panic("Root mount failed, startup aborted.");

    I agree with Giovanni as it's easier to customize than the
proposed patch above; it'll be nice when the work has been done where
hacks like these won't be required (waits in anticipation for scottl's
cam work).
Thanks!
-Garrett