On Tue, 13 Oct 2009, Nils Goroll wrote:
Regarding my bonus question: I haven't found yet a definite answer if there is a way to read the currently active controller setting. I still assume that the nvsram settings which can be read withservice -d <arrayname> -c read -q nvsram region=0xf2 host=0x00do not necessarily reflect the current configuration and that the only way to make sure the controller is running with that configuration is to reset it.
I believe that in the STK 2540, the controllers operate Active/Active except that each controller is Active for half the drives and Standby for the others. Each controller has a copy of the configuration information. Whichever one you communicate with is likely required to mirror the changes to the other.
In my setup I load-share the fiber channel traffic by assigning six drives as active on one controller and six drives as active on the other controller, and the drives are individually exported with a LUN per drive. I used CAM to do that. MPXIO sees the changes and does map 1/2 the paths down each FC link for more performance than one FC link offers.
Bob -- Bob Friesenhahn bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
