RAID configuration for video editing

I'd like to install a RAID controller to improve video editing on my PC, but I'm not sure about RAID configuration I have to use (0,1,0+1,5,1.5). Obviously for improving performances I should use 0 and for 100% safety 1, if I use 5 I should have both safety and performances but I don't know if it's too much for me (even too much expensive) What do you think (or use) Thank you

I've tried numerous RAID configurations with the same rig, and RAID0 is the encoding champion. It is also the riskiest. RAID5 with 2 different cards, ran much faster than any single drive, but that's a lot of drives for the sake of security. Most powerful RAID solution would be 2 74GB Raptors in RAID0, on fastest onboard RAID controller. Expect data transfer rates over 100MB/s. Keep a very large IDE drive in the system for critical backups, and a place to put completed video work. Partitioning the array, with fastest portion(beginning of drive) dedicated to OS, will give additional speed. I use a 10GB partition for OS and apps. Load video data into second partition for processing.If you have at least 1GB of memory, disable Virtual Memory. Page to RAM is a really good idea, when dealing with arrays. Remember, in RAID0, no single drive has all the data,One of em screws up, or gets accidently disconnected while powered, and all is lost. (DOH, done this 3 different times). I have 7 raptors in the same box, 5 36GB, and 2 74GB varieties, on 2 different RAID controllers. Heat and Power become major issues when you get this stupid. On the plus side, Frames/Second can soar on a good rig, using RAID. With a single 74GB Raptor, best speed I've gotten was 52 FPS. With 2 of these babies in RAID0, hit 86 FPS a few times. Raid5 rates in the 70's with both RAID5 cards. As pointed out in previous post, CPU can play a part in limiting data usage. FSB is another. I use a 1000MHz FSB, to a 3.75GHz Intel CPU. Obviously my latest rig was born to overclock. Saving up my pennies for a dual opteron system now. Really should go edit my sig, lot has changed in last 2 months. P4 3.0@3.75.

@leadman584 So what do you suggest to me, RAID5 (for example 3 200Gb maxtor SATA 8Mb) or RAID0 (two hd) with the third one (not raid) only for backup?

Instead of RAID1 or RAID5 you can use a nice little tool called "Mirrorfolder" for data security. It mirrors specified folders to another drive - you don't waste a lot of space like with RAID1 because only the important folders are being mirrored. I use it even I don't have any RAID configuration - and you should definitely backup your data somehow when you're using RAID0 (chance of HD failure is doubled...)