On Jul 15, 2007, at 12:59 PM, Peter Tribble wrote: > On 7/13/07, Torrey McMahon <[EMAIL PROTECTED]> wrote: >> ZFS needs to use the top level multipath device or bad things will >> probably happen in a failover or in initial zpool creation. Fopr >> example: You'll try to use the device on two paths and cause a lun >> failover to occur. >> >> Mpxio fixes a lot of these issues. I strongly suggest using mpxio >> instead of powerpath but sometimes its all you can use if the >> array is >> new and mpxio doesn't have the hooks for it ... yet. > > Hm. This is pretty old stuff, and what is irritating is that I had > it all > working under mpxio. Then I was told the system had to be reconfigured > to use powerpath, and I've not seen my data since. > > (I follow the logic that it's the datacenter standard, although I'm no > longer sure I agree with it based on my experience so far; nor does > my own experience match the alleged technical superiority of > powerpath over mpxio. Ho hum.)
I would definitely offer to work with your SAN team on getting MPxIO "certified" with your arrays. Where I work, we use Veritas DMP with our Hitachi arrays. When we go to ZFS, we will, of course, go to MPxIO instead of Hitachi's HDLM. The only difference from this thread is that we use Sun-branded Qlogic HBAs instead of Emulex on both our SPARC and x64 Sun servers. It's been slow going for me, but I've had great success working with my SAN team (who in turn work with HDS), on getting new technologies* working in our environment. -john *Our SAN team runs things very conservatively. They consider "new" technologies to be things introduced one to two years ago. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
