Re: [Xen-users] Mount block-device rw on more DomU

[Marco Natali <marco@xxxxxxxxxx>]

Yes, if I will access to that volume in asyncronous way!
Instead I'll install Oracle RAC with ASM (Automatic Storage Managment) and OCR (Oracle Cluste Ready),  two objects that manage in a cluster way the volume I want to use in r/w.
This could work like a real external storage.
Don't you think so?

Marco Natali


On Tue, 2006-02-14 at 11:52 +0100, Michael Mey wrote:
> On Monday 13 February 2006 23:44, Marco Natali wrote:
> > Hi all
> > I would like to install for testing an Oracle RAC on two DomU and I need
> > of some block devices simulating an external storage.
> > I would like to mount an LVM volume in Dom0 mounted rw by two DomU, but
> > when I try to attach the block device I receive this message:
> >
> >   # xm block-attach oracle1 phy:/dev/vg0/oracle-db /dev/sdb1 rw
> >   Error: Device 2065 (vbd) could not be connected.
> >   Device /dev/vg0/oracle-db is mounted in a guest domain,
> >   and so cannot be mounted now.
> >
> > Is it possible to force in some way?
> >
> > Thanks
> >
> > 	Marco Natali
> >
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
>
> Hi,
>
> you really wouldn't want to do that. The possibility for destroying the 
> filesystem during the first few minutes is nearly 100 %. For this purpose, 
> you should consider using a cluster filesystem, like gfs, ocfs2 (easier to 
> set up) or sth similar.
>
> Michael


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