On Fri, 11 Jul 2008, Ross wrote: > > If you want to guard against any two trays failing, you need to use > some kind of dual parity protection. Either dual mirrors, or > raid-z2. Given that you only have 8 LUN's, raid-z2 would seem to be > the best option.
System reliability will be dominated by the reliability of the weakest VDEV. If all the VDEVs have the same reliability then the reliability of the entire load-shared pool will be the reliability of one VDEV divided by the number of VDEVs. Given sufficient individual VDEV reliability, it can be seen that it takes quite a lot of VDEVs in the load-shared pool before the number of VDEVs becomes very significant in the pool reliability calculation. Bob ====================================== Bob Friesenhahn [EMAIL PROTECTED], 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
