Hi All, I think I have potentially made a huge mistake and would love some help. I have a Mac Pro late 2009 with 1 X 250 GB SSD (OS and Applications), 4 x 2TB drives within my Mac, of which 2 are RAID 0 (Western Digital Black) for my video work and the other 2 are raid 0 and used for time machine (Western Digital Green). I needed more space so I purchased 2 x Western Digital 2 TB Black drives and I purchased 3 x 2TB Green Drives. My plan was to take out the current 2 Green Drives in my MAC and replace them with 2 Black drives and then striping them all giving me 1 large 8TB Volume made up of 4 x Western Digital Blacks. I was going to then use the 5 Western Digital Greens in an external enclosure and set them up as Raid 5. This way I have 8TB + a spare drive in case of any failures. I purchased a http://www.span.com/product/5-Bay-S...-for-5x-SATA-HD--Port-Multiplier-eSATA-~27841 thinking that this would be perfect. But today I have found out that I am now slowing my system down using this method as its software raid and getting an enclosure which has Hardware Raid is a much better solution. http://www.amazon.co.uk/Lian-Li-Ext...TVWM/ref=sr_1_2?ie=UTF8&qid=1340813279&sr=8-2 The company I purchased the enclosure from now are asking for a 20% restock charge as the fault was that off my own. Is it worth sending back the enclosure and getting the Lian Li?