On 2007-09-24, Nuno Fernandes <[EMAIL PROTECTED]> wrote: > > I have 4 paths to each lun. > > (a) HBA1 ====== DS4x00 controller A ==== LUNx > (b) HBA1 ~~~~~~ DS4x00 controller B ~~~~ LUNx > (c) HBA2 ====== DS4x00 controller A ==== LUNx > (d) HBA2 ~~~~~~ DS4x00 controller B ~~~~ LUNx
With engenio/rdac that's what you have if you're lucky, but you might just as well be unlucky and get: (a) HBA1 ====== DS4x00 controller A ==== LUNx (b) HBA1 ====== DS4x00 controller B ==== LUNx (c) HBA2 ~~~~~~ DS4x00 controller A ~~~~ LUNx (d) HBA2 ~~~~~~ DS4x00 controller B ~~~~ LUNx Then a failure on (a) sends a failover message to controller B over (b).. > When i cut off paths (a) and (c) it should send though paths (b) and (d) > commands to failover the active controler of the LUNx from controller A to > controller B. It that moment both paths (b) and (d) would be active and data > should be accessible. How do you cut of (a) and (c), without affecting (b) and (d) ? > > It's the same thing as EMC Clariion Active/Passive controller. I'm not familiar with EMC Clariion... but have hit this exact same problem on IBM DS4800/RDAC. -jf _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list
