On Thu, 22 Oct 2009 17:47:49 +0100 Stepan Kadlec <[email protected]> wrote:
> how about the NVSRAM firmware branch > Single-port-clustering-MD3000-N133X-735890-705.dlp ? This firmware is only supported with MSCS. > wouldn't this enable it? does anyone have some experience with that? Again, with AFAIK disclaimer, the MSCS is in the cases where single-port clustering is used configured in such a way that the "Passive" failover node does not access the LUN before its peer is dead, in such a case the LUN will failover to the other controller and the second cluster node can start the services and access the LUN. In this scenario there is still no 2 nodes using same LUN at same time. > thanks, stepan. > > Harald Jensås wrote: > > On Thu, 22 Oct 2009 09:34:49 +0100 > > Stepan Kadlec <[email protected]> wrote: > > > >> How can be single LUN access from different controllers? > > > > You cannot. > > > > AFAIK the MD3000 SAS is an Active/Passive array, and no ALUA support > > available. Any given LUN is controlled by one controller at a time, > > and all host that need to access the LUN must be connected to the > > controller that currently controls the LUN. When two hosts > > connected to separate controllers only need to access to the same > > LUN you get LUN trashing. E.g both hosts will issue failover in an > > endless loop. > > > > > > -- Harald _______________________________________________ Linux-PowerEdge mailing list [email protected] https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
