Greetings fellow PC-sufferers... My Dell Precision 690 woke up this morning and was missing the D drive. No major problem as the OS is on the C Drive and everything on the D is backed up on a NAS drive. First indication was that one of the disks seemed to be making a chittering noise on boot, then itunes started hunting for the library (which is on the D Drive). Either one of the internal drives is kaput (I think it is 4x500gb RAID) or the disk allocation is screwed. Outside my ability so the local PC doctor has it. It's quite a nice machine (2 x Xeon 5160 @ 3.00ghz) and 16gb of RAM with two double headed Nvidia cards. D drive failure is hardly an excuse to BER it so I'd like to consider fresh options - also, it was a freebie. Finally, it runs hot and so single-handedly heats my garden office. Questions: It clearly dates from a time when the way to get 2Tb was RAID. Now you can get that on one drive for under £70. So, is the best thing to get one of those and bin the four-disk array? It's an opportunity to go from 64 bit Vista ultimate to 64-bit Win 7 in my view. Any pooh traps? SSD is also pretty cheap at the mo. This thing takes a while to boot - will I see advantages if I put the OS on an SSD C drive and the rest of the PC on a disk as D? If so, what size of SSD is recommended? Or is this a waste of time and should I be spunking 1k on a gaming computer (it's chiefly used for FSX, CoD, Lightbox, Photoshop, Visio, Memory Map and itunes) and binning the family Christmas? Thanks in advance.