Xen devel - Jul 2008 - Windows HVM guest disk is not write-protected with ''r'' option

Hello,

Using a Windows 2003 guest with second disk device in the xm config file:

disk=[
     'phy:/dev/md4,ioemu:hda,w',
     'phy:/dev/md5,ioemu:hdb,r'
     ]

the second disk is not actually write protected under Windows.  You can, for
example, mount the NTFS volume and create/delete files.

It seems mdadm/nbd should not allow this.

I am using Xen 3.2.1 and would appreciate any comment on this issue.

Thank you,

Stephen Quintero



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This is a known issue -- fully-emulated disks cannot be made read-only
because qemu-dm does not respect the read-only flag. There is a patch for
this which we are considering for Xen 3.3.

 -- Keir

On 30/7/08 00:42, "Stephen Quintero" <stephen@3tera.com> wrote:
> Hello,
> 
> Using a Windows 2003 guest with second disk device in the xm config file:
> 
> disk=[
>      ''phy:/dev/md4,ioemu:hda,w'',
>      ''phy:/dev/md5,ioemu:hdb,r''
>      ]
> 
> the second disk is not actually write protected under Windows.  You can,
for
> example, mount the NTFS volume and create/delete files.
> 
> It seems mdadm/nbd should not allow this.
> 
> I am using Xen 3.2.1 and would appreciate any comment on this issue.
> 
> Thank you,
> 
> Stephen Quintero
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel


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