Can I change the device of the "/" mount point at boot time.

[Tapan Chaudhari]

On Tue, Jul 15, 2008 at 11:38 AM, Daniel O'Connor <doconnor at gsoft.com.au>
wrote:

> On Tue, 15 Jul 2008, Tapan Chaudhari wrote:
> >    Thanks Deniel for the reply. I am aware of the fact you mentioned
> > and will keep in mind.
> > Well what i am trying to achieve is a simple thing to write an
> > interception driver to catch all the i/os going to a particular
> > device, do some manipulations on it and than let it through to the
> > original device. Well as you mentioned about geom, I have recently
> > posted a mail on GEOM mailing list as I could not find geom doing
> > interception, the discussion is still on (You can see the mails with
> > subject line "Can GEOM be used to intercept the I/o calls to an
> > existing mounted device?"). Any sugessuions on interception driver
> > will be helpful?
>
> My first question would be "Why do you want to do that?"

I am planning to write a block level snapshot driver.


>
>
> > As an interception driver is not possible, for time being I am going
> > towards the redirection concept which will require a reboot and
> > changing the devices on the mount points. For redirection driver, I
> > dont think I will need geom. I can directly create a new device.
> > Rather I think it would be an overhead using geom for a virtual
> > device.
> > Any thoughts on both the issues?
>
> I think you'd have a lower overhead and much less hassle writing a GEOM
> class and using that.
>
This sounds good. I will try using GEOM first. But if I could achieve
interception, as I described earlier, I will go for that rather than
redirection.


>
> --
> Daniel O'Connor software and network engineer
> for Genesis Software - http://www.gsoft.com.au
> "The nice thing about standards is that there
> are so many of them to choose from."
>  -- Andrew Tanenbaum
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