I don't think controllers really fail that often, but anything that increases redundancy is likely to be an improvement. I would hope that the controllers used in Thumper mostly keep their channels independent from a PCI point of view, so that your pools don’t collide. (It does mean that each read or write is going to require using all PCI buses, but since the total available bandwidth is the same under any configuration, you should be OK.)
Note that controllers have also been known to fail in such a way that they disable the attached PCI bus. Thumper has an independent bus for each controller (nice!), so as long as the bridges themselves can handle this failure mode (and they are supposed to), you should be OK even against this. This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
