Re: ISCSI on zvols with two maschines. What needs to be done?

----- Gary Palmer's Original Message -----
> > > ----- dennis berger's Original Message -----
> > >> Hi folks,
> > >> 
> > >> The following question often comes to me, when I speak to my customers.
> > >> 
> > >> Is it possible to attach two systems to the same storage array using shared SAS and use istgt + zfs to
provide 
> > >> a reliable ISCSI target. This could be active/passive or later active/active. In case it's not
possible, what needs to be done?
> > >> 
> > >> The questions that came into my mind.
> > >> 
> > >> Can I connect two freebsd to the storage and boot them up? Just that both systems would see the physical
devices. 
> > > 
> > > Yes, please see:
> > > 
> > > http://people.freebsd.org/~jwd/zfsnfsserver.jpg
> > 
> > This is exactly how I would like to use it.
> > ---
> > Do I need to zfs import?! 
> 
> This is the key bit.  What John suggests is that on system A you have
> poolA and on system B you have pool B.  Both pools have their own,
> separate, disks.  
> 
> If system A goes down, system B notices this and imports poolA and shares
> out its iSCSI devices.