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xen-devel
Re: [Xen-devel] Re: Virtual block devices (vbd) still not working... :-(
>
> > This refreshes Linux's view of its partition table, and also polls Xen
> > to find out the current parameters of the VBD. Without doing this,
> > Linux will never see the correct capacity for the VBD (it will
> > probably continue to think that it has zero size!).
>
> Whenever Alex or I have used VDs they've just worked: There's
> no way to populate a vd with a file system unless you can access
> it from domain0, so its obviously been working for some people.
>
> I wander if it's got something to do with whether the newly
> created virtual disk just happens to have something approximating
> a valid partition table or not?
No, it doesn't. Linux definitely thinks the vbd has zero size so never
even gets to try to read a partition table.
I followed what you did exactly, and without an explicit poll of Xen
it definitely didn't work. I'd like to see how your machine setup is
different -- for example, are you sure the /dev/vbd* nodes have the
right device numbers? (Should be major = 125, minor =
(vbd_id*16)+partition).
I'm going to have some more of a look at the blkdev stuff now, but it
would be nice to know how come it's been "working" for you.
-- Keir
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