>I setup a similar system on a HDS-9570 but with only one >card in each machine - 'assuming' that the failover in the >driver would cope if a controller on the HDS failed (as >opposed to a QLogic failure) > >This worked fine if I disconncected a path in the fabric but >when we took a controller of line the failover failed. > >Since then I have used md multipath which has tested fine I have a similar issue, two storage processors, two HBAs, and redundant paths between them. On the host, I see 4 SCSI devices, two valid, two invalid - I'm guessing this is caused because only one storage processor exports a particular LUN, so half the paths are invalid until a storage processor fails over. sdd - SP A Path 1 sde - SP B Path 1 sdf - SP A Path 2 sdg - SP B Path 2 I have a LUN currently on SP B, so I can use md multipath configured with /dev/sde and /dev/sdg, and that seems to work. However, two things: 1) How do I set this up to handle a failover to SP A? 2) Multipath only seems to work in failover mode, is there a way to load balance across the two paths? Anyone have any hints? :) _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
