Panic booting from 6.1-BETA4-amd64-disc1

Mark Kane mark at
Fri Apr 7 08:17:53 UTC 2006

Heinrich Rebehn wrote:
> Hi list,
> i wanted to try out 64 bit support on my ASUS A8V Deluxe with
> AMD Athlon(tm) 64 X2 Dual Core Processor 3800+
> I downloaded 6.1-BETA4-amd64-disc1.iso from the FreeBSD ftp site, burned 
> a disc an booted from it.
> However, it failed:
> Waiting 5 seconds for SCSI devices to settle
> panic: sym: VTOBUS FAILED
> Booting with ACPI disabled or safe mode did not help.
> Googling and searching the ML did not show any hints.
> Any ideas?

It may be due to this:

I tried to install a SCSI card that uses the sym driver on my amd64 
machine last week and it had a panic with the same message. It works 
fine in an i386 machine but I am unable to use it on my amd64 box. 
Someone sent me the card for free and I already have an Adaptec on order 
to use with the amd64, but from what I understand that driver doesn't 
work with amd64 yet.

If possible, try removing the SCSI card and then trying to boot. It 
should work then.


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