Hi, I just built a new rig and am having some weird issues running RAID-5 on IRST. The stats are: CPU: Intel Core i7-2600 Motherboard: Asus P8Z68-V Pro BIOS Version: 0501 (latest, came with the board) RAM: G.SKILL Ripjaws Series DDR1333 F3-10666CL9D-8GBRL (4x4GB) GPU: EVGA GeForce GTX 560 Ti 1GB (01G-P3-1560-KR) Power supply: SeaSonic S12II 620 Bronze 620W I'm running the OS off a random 500 GB hard disk and want to set up RAID-5 with 5x3TB disks (Western Digital WD30EZRS, shows up in IRST precisely as: WDC WD30EZRS-00J99B0). RAID setup: OS: Windows 7 Enterprise 64-bit (yes, Enterprise, through my school. Essentially equivalent to Ultimate) RAID software: Intel Rapid Storage Technology 10.5.0.1027 (from: http://support.asus.com/Download.asp...V+PRO&p=1&s=39) The About dialog says it's 10.5.0.127, even though the Asus website says it's 10.5.0.1026. Ports 0 and 1 (gray) are SATA 6Gbps, Ports 2-5 (blue) are SATA 3 Gbps. Port 0: OS installed on Seagate 500 GB disk. Ports 1-5: 3 TB disk each. (Yes, I'm running the RAID across the two different port types, which might be part of the problem? I couldn't find documentation saying that it's a problem and nothing prevented me from setting it up this way...) My problem is, while the array was building, and also now that it's complete, my machine randomly reboots. The time between reboots seems to be uncorrelated with load on the system (sometimes when I'm playing Starcraft II, other times when I'm doing absolutely nothing). I disabled the "automatically reboot upon error" option, but it reboots anyway. After a reboot, when I log back in, I get a little balloon that says "Data on one more more volumes is protected from a disk failure", but IRST shows the array status as "normal", so I'm not sure what the deal is. A few other potentially useful pieces of information: 0. When building the array, occasionally, it complains that the disk in port 4 (one of the 3 Gbps ones) has failed. Now I've used these disks for weeks in a Linux mdadm RAID without any problems, so I'm pretty sure it's not the disks. I swapped disks 4 and 5 with ports 4 and 5 and the message went away. 1. I thought it might be the RAM. I started running memtest86+ off a USB stick last night and went to bed. When I woke up, the machine has rebooted back into Windows. I tried again this morning and the same thing happened when I got back from work. I suspect that it's the RAID controller freaking out. I will pull out the disks and try memtest86+ again without it. If anyone has any ideas, I would really appreciate it. Thanks!