My new 27" i7 is supposed to be delivered next week, got the SATA cables for installing my own SSD, but am a bit doubtful as to where placing my Scratch space. So, I will end up with an iMac with two internal drives (SSD + HDD). OS, System Library and Applications go to the internal SSD (120GB). As I will be using FCS (besides CS package and other smaller programms) I would like to set up a dedicated Scratch drive for it. Which of the following options would you go for, and why?: 1: install scratch space on the internal HDD together with all the other data (pics, music, videos - space is not the issue with a 2TB drive). Would a partition be advisable in this case, since I heard that partitioning slows a disc down considerably. 2: install scratch space on the internal HDD (scratch only), and all other files (pics/music/video) on an external FW800 HDD. 3: install scratch space on the external FW800 HDD (all other files on the internal HDD like usual). 4: use an external RAID backup as scratch space as well (something like the Drobo) with a FW800 connection. I was looking for feedback on using the Drobo not only as a backup, but also as a scratch - some people found it great working, others not so much...I'd like to find out, if that has to do with the FW800 bottleneck, or if a Drobo scratch is even slower than an external FW800 HDD would be. I know that eSata would be faster, but that is currently out of reach (besides the OWC mod.). What do you think?