On Wed, 2005-10-26 at 15:37 -0400, Phil Lowden (plowden) wrote: > I'm using LVM2 with device-mapper-multipath 0.4.5 on GA RHEL 4 update 2 > release, kernel version 2.6.9-22.ELsmp. Storage is 4 Clariion CX600 > LUNs, > 2 with a primary path on SP A and 2 on SP B. HBAs are QLA3240 with > firmware 3.03.15 IPX and the RedHat-distributed driver version > 8.01.00b5-rh2. > > When I disrupt one path by disabling a host or SP switch port, > failover works great but failback doesn't happen automatically > with the current config (below). By this I mean > when the connection to e.g. SP B is restored, all > 4 LUNs stay trespassed to SP A. Is this by design? > Or is there support for automatic failback, i.e. > I/O is paused and a trespass is issued to restore > the 2 SP B LUNs to their primary paths? > > Of course manual failback is possible, but without > quiescing I/O I found I was able to munge my LVM2 > objects up quite nicely. Manual failback with quiesced > I/O is fine. No one has automatic failback working on Clarrion storage? /Brian/ -- Brian Long | | | IT Data Center Systems | .|||. .|||. Cisco Linux Developer | ..:|||||||:...:|||||||:.. Phone: (919) 392-7363 | C i s c o S y s t e m s -- dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel