amd64/161418: [panic] FreeBSD 9.0beta3 under Virtualbox: lost device

[Floris Bos]

>Number:         161418
>Category:       amd64
>Synopsis:       [panic] FreeBSD 9.0beta3 under Virtualbox: lost device
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-amd64
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Oct 09 11:00:02 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Floris Bos
>Release:        9.0 beta 3
>Organization:
>Environment:
>Description:
Running FreeBSD 9.0 beta 3 under Virtualbox 4.1.4 r74291 (KUbuntu 11.04 host system).


- While extracting the installation files to a slow hard disk you often get a "lost device" kernel panic.

This doesn't happen always (sometimes installation does complete successfully) but more often than not.

Screenshots of 2 seperate occasions: 

http://postimage.org/image/w98sqs04/
http://postimage.org/image/zft33ick/


(dmesg on the host system does not show disk errors)
>How-To-Repeat:

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: