Darren Dunham wrote: >>> If it helps at all. We're having a similar problem. Any LUN's >>> configured with their default owner to be SP B, don't get along with >>> ZFS. We're running on a T2000, With Emulex cards and the ssd driver. >>> MPXIO seems to work well for most cases, but the SAN guys are not >>> comfortable with it. >>> >> Are you using the top level powerpath device? Is the clariion in an >> auto-trespass mode where any i/o going down the alt path will cause the >> LUNs to move? >> > > My previous experience with powerpath was that it rode below the Solaris > device layer. So you couldn't cause trespass by using the "wrong" > device. It would just go to powerpath which would choose the link to > use on its own. > > Is this not true or has it changed over time? >
I haven't looked at power path for some time but it used to be the opposite. The powerpath node sat on top of the actual device paths. One of the selling points of mpxio is that it doesn't have that problem. (At least for devices it supports.) Most of the multipath software had that same limitation However, I'm not an expert on powerpath by any stretch of the imagination. I just took a quick look at the powerpath manual (4.0 version.) and it says you can now use both types which seems a little confusing. Again, I's be interested to see if using the pseudo-device works better.....not to mention how it works using the direct path disk entry. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
