  No, you can't ... which is why I asked.   You can't disable it.  The PERC 6 does NOT support SED - it has no knowledge of that feature, so it can't disable or otherwise manage it.  There are no real "options" on the PD MGMT screen ... if they are showing as foreign, then you must first clear the foreign configuration on the VD MGMT screen (highlight controller, F2, Foreign, Clear). If you don't have these options - no way to clear the foreign configuration and/or configure drives in a RAID array, then you probably can't use these drives on the PERC 6 at all.  The H700 is supported in your server and does support SED drives, although I'm not sure what requirements exist for them.
 I have a R710 server with PERC 6/i controller which originally had two 136 GB SATA drives and I want to replace them with two 500 GB SAS (Dell Constellation SED) drives. I put the SAS drives in slots 0 and 1, power up the server and the controller BIOS is reporting them both as failed. the top led on both drives flashes amber. The controller firmware is v6.3.1-0003, A14, as reported by the BIOS set up screen. While these drives are not new, I am wondering whether they had indeed failed or there is something else I need to do on the server to allow these drives to be used. Can anyone give me any suggestions? Thanks, Daniel 
Using SAS drives for R710 PERC 6/i controller