Hey, 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?
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? Thanks, --Tapan. On Tue, Jul 15, 2008 at 9:02 AM, Daniel O'Connor <[EMAIL PROTECTED]> wrote: > On Tue, 15 Jul 2008, Tapan Chaudhari wrote: > > Thank You Mateusz and Mike. I guess I am clear with my doubt now. I > > will also go through the man pages to go into depth of it. > > The critical thing is that the loader must read the kernel (and modules, > config etc..) from a disk the BIOS knows about. > > After that you can use any device the kernel knows about. > > As for the virtual device aspect - could you use a geom class to do you > want? It's hard to say without an overview of what you actually want to > achieve :) > > -- > 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 > GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C > _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"