What i'd do is take your disks out of the raid setup and run a diagnostic on them individually (please do backup before you do this) Easyest way to do this is change your Chip mode to IDE/S-ATA instead of raid. once you put the chip back on Raid it will reform your Raid setup, however due to the error you are getting im not 100% sure if that will happen. Checking your Memory with memtest (UBCD is great for that, also for your hdd diagnostics)might also be smart. If your disks turn out to be in great shape, then there is little more to do as fiddling with a raid can result in all data being unusable. if you desperately want to get rid of this error (and your disks are 100% fault free) take them out of the raid, lowlvl format them, remake the raid and reinstall or put your data back on there. Lowlvl format might be a bit extreme just rebuilding the raid might work too but better safe then sorry. Also check if your PSU is powerfull enough for the computer you have. edit: i just saw your specs, if thats what your current setup looks like check if your overclock is still stable, corruption can also occur cause of overclocking. Edit2: Check your s-ata cables too! IMSM can be quite annoying if one is a little loose.