On 01/14/12 3:55 PM, Vahan Yerkanian wrote: > At the moment I have two 9750-4i installed, each having a sff8087 x4 cable going to the same backplane containing dual-port sas disks. > > This was supposed to be a load balanced, multi-controller failover setup. AFAIK the only way to achieve that is to use plain SAS HBA's such as the LSI 2008 family (92xx cards), not raid controllers. this is a representive SAS midplane manual http://www.supermicro.com/manuals/other/BPN-SAS-936EL.pdf it shows failover combinations starting on page 3-3... -- john r pierce N 37, W 122 santa cruz ca mid-left coast