Hey guys, having some annoying troubles with a RAID5 array I've been playing around with. Basically I built a raid5 array with a Promise Supertrak EX 8350 with 5 x 1.5tb seagate hdd's, installed Windows Server 2008 r2 on a separate disk for the OS. After 20 mins of use I would start to experience random file corruption only on the raid array. After a reconfiguring/recreating the array with different stripe sizes and what not, the exact same thing occurred. I thought it must have been due to the raid controller being faulty, so I gave up and removed it, then plugged all the drives into the motherboard to use onboard raid. I configured the drives again in raid 5 (with brand new cables if its worth mentioning) and fired up windows, within about 45 minutes I noticed further corruption occuring Im not pretty confused as to what the problem might be... a faulty drive maybe? If so, how would I even find out which one? The raid shows up as healthy using both the promise controller and onboard raid. The only other thing I could think of is possibly a ram issue... but that wouldnt really explain why I only experience corruption on the raid and not the standalone OS hard drive. Any thoughts on where I should be looking next? My only real thought is to run memtest and see what the results of that are. Cheers.