If I have 16 disks SATA 7200 rpm and 8 disks SAS 15k rpm in the same JBOD array what should be the optimal zpool configuration? Should I create 2 zpool, one with the Sata Disks and one with the SAS disks? Or If they are in the same zpool (Let say mirror (same type of disks) and then stripped) what will be the average speed of the combined pool: faster than a stipped pool of SATA disks or faster than a smaller pool of SAS disks (because I have more spindle). Thanks Bertrand B?lair System Architect Sun Microsystems