Yes, if you connect a SATA drive to the same controller as the SAS drives it will lower the signaling voltage to match the SATA drive.  This could cause performance degradation across all drives. This is why you should use an interposer.  One of the functions of the interposer is to allow SATA drives to operate at a higher signaling voltage.  If you use an interposer with the SATA SSD then it will operate at SAS signaling voltages. Thanks
My R410 is a host to various virtual machines running in a Hyper-V environment in Windows Server 2008 R2. The original specification has been upgraded since supply (Service tag <ADMIN NOTE:Service tag removed per privacy policy>) as is now as follows:PERC 6/i3x 1TB SAS Seagate Barracuda ES.2 ST31000640SS 7200rpm 16MB Cache The hard disks are configured in RAID5 and are fitted to the chassis in Dell hotswap caddies. There is one vacant bay in the chassis.The purpose of the upgrade is to make the webserver virtual machine run faster by mounting its Hyper-V VHD file on a disk volume constructed from SSD drives. The proposed upgrade is 2x 64GB SSD drives operating in RAID installed in a Chieftec double 2.5" CTM-1322S caddy, fitted into the spare 3.5" drive bay. HOM p86 "CAUTION: Combining SATA and SAS hard drives in the same system configuration is not supported."?? I am seeking clarification on the following: 1. What is the best option for connecting the two new drives? Can they be cabled to the PERC6/i or can the backplane accommodate the 3x SAS drives in combination with the 2x caddied SATA SSD drives? 2. If the PERC6/i can't be used, can I cable the two SSDs straight to the motherboard SATA connectors and setup the RAID in Windows disk management? 3. Is there anything I've missed or should be aware of?
PowerEdge R410 PERC 6/i SSD Hard Disk Upgrade configuration question