On Thu, Jun 11, 2009 at 12:35 AM, <Levy_Jerome@xxxxxxx> wrote: >> I went through the multipath code and found there was hardware handler >> for specified hardware, such as emc. When init path, it will use the >> trespass command given by the handler. Does this mean it only support >> the A/PF mode of array? When SCSI commands, such as SCSI PR, are sent >> to a disabled path, will trespass be triggered? > > In A/PF mode, with failovermode set to 1 (as it should be for dm-mpio) > the Clariion array will only trespass LUNs on receipt of an explicit > trespass command, not on other I/O. Yes, it's what the A/PF mode. But for ALUA, how does device mapper mutipath driver failback the path and how to avoid Ping-pong state? I could not find this part of codes. Thanks, > > Jerry Levy, EMC > > -- > dm-devel mailing list > dm-devel@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/dm-devel > -- Xie Gang -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
