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From: Bernhard =?ISO-8859-1?Q?Fr=F6hlich?= <decke@bluelife.at>
To: Scott Ballantyne <sdb@ssr.com>, emulation@freebsd.org
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Date: Sun, 08 Apr 2012 08:56:05 +0200
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Subject: Re: Can't install Windows 7
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On Sa.,   7. Apr. 2012 23:26:04 CEST, Scott Ballantyne <sdb@ssr.com> wrote:

> Hi again,
> 
> Trying to install windows 7 from the DVD, I keep getting the following
> error:
> 
> --------------------------
> Failed to open a session for the virtual machine Windows7.
> 
> Cannot open host device '/dev/cd0' for readonly access. Check the
> permissions of that device (VERR_ACCESS_DENIED).
> 
> Result Code: NS_ERROR_FAILURE (0x80004005)
> Component: Console
> Interface: IConsole {1968b7d3-e3bf-4ceb-99e0-cb7c913317bb}
> --------------------
> 
> And:
> 
> $ ls -l /dev/cd0 /dev/xpt0 /dev/pass0
> crw-rw----   1 root   operator       0, 112 Apr   7 17:08 /dev/cd0
> crw-rw----   1 root   operator       0, 108 Apr   7 17:08 /dev/pass0
> crw-rw----   1 root   operator       0,   76 Apr   7 17:08 /dev/xpt0
> 
> $ id
> uid=103(sdb) gid=20(staff)
> groups=20(staff),0(wheel),5(operator),32(texuser),920(vboxusers)
> 
> So there should not be a permission problem.   The DVD drive is fine,
> and the DVD is fine.

Either follow http://wiki.freebsd.org/VirtualBox on how to correctly setup cd/dvd passthrough or create a disk image from /dev/cd0 with dd and use that in vbox.

> I can't use "mount_udf" to mount it on FreeBSD, not sure why, but I
> can read it on a windows machine.   However, I can mount other UDF
> discs.

The FreeBSD udf implementation doesn't support the latest udf specification.