On Tuesday 16 January 2007 01:28, Javier Guerra wrote:
> but, you could also: (**DANGEROUS**)
> 1) keep mounted ro in all DomUs
> 2) mount rw in Dom0
> --- as soon as you do that, all DomUs are unstable!! ---
> 3) modify in Dom0 (pray that DomUs don't crash!)
> 4) umount from Dom0
> 5) remount on all DomUs (still ro)
>
> the point is that the 'r', 'w' or 'w!' flag is only checked at DomU
> creation time; if at that moment the block device isn't mounted rw by
> anybody (including Dom0), it will work. later, you could mount it behind
> Xen's back (and risk all Dom0s, of course)
First of all, thanks for the reply.
but, which is the difference between that approach with "w!" (saying that all
domU's will mount only ro) and the above?
domU's will became unstable (strange, i figured out only files missing, as i
think it should be) in the same way, and also (saying that i have "bad guys
playing with my domUs) i can have a data loss.
so, again, why is not "r!" a valid flag?
thanks
d.
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