> from a two disk (10krpm) mirror layout to a three disk raidz-1. wrights will be unnoticeably slower for raidz1 because of parity calculation and latency of a third spindle. but reads will be 1/2 the speed of the mirror because it can split the reads between two disks.
another way to say the same thing: a raidz will be the speed of the slowest disk in the array, while a mirror will be x(Number of mirrors) time faster for reads or the the speed of the slowest disk for wrights. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
