I know they can provide this type of information ... they have done it several times for me. Mixing SAS and SATA on PERC controllers is fine ... the controller can handle them both at once, however, you cannot mix SAS and SATA in a Virtual Disk (array).  I'm not sure why you would want to, but, for example, you could not configure a 300GB SAS drive and a 320GB SATA drive in a 300GB RAID 1.  You could, however, add two or three SAS drives to your system and configure them in their own RAID array just fine.
I have a PowerEdge T610 server that has three available drive bays and I'd like to add more storage to it. Can anyone recommend what make/model of SATA hard drives might work best in this server in a RAID5 volume? Are there any drives that are known not to work or that I should avoid? Thanks for any feedback on this question.
What SATA drives to use in PowerEdge T610?