On Wed, Jun 20, 2007 at 11:16:39AM +1000, James C. McPherson wrote: > Roshan Perera wrote: > > > >I don't think panic should be the answer in this type of scenario, as > >there is redundant path to the LUN and Hardware Raid is in place inside > >SAN. From what I gather there is work being carried out to find a better > >solution. What is the proposed solution or when it will be availble is > >the question ? > > But Roshan, if your pool is not replicated from ZFS' > point of view, then all the multipathing and raid > controller backup in the world will not make a difference.
If the multipathing is working correctly, and one path to the data remains intact, the SCSI level should retry the write error successfully. This certainly happens with UFS on our fibre-channel SAN. There's usually a SCSI bus reset message along with a message the failover to the other path. Of course, once the SCSI level exhausts its retries, something else has to happen, just as it would with a physical disk. This must be when ZFS causes a panic. -- -Gary Mills- -Unix Support- -U of M Academic Computing and Networking- _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
