System Configuration: Motherboard: ASUS M2A-VM AMD690G MicroATX AMD (ATI SB600 controller) BIOS Version: 0901 Processor: AMD Athlon 64 X2 4200+ Windsor 2.2GHz Socket AM2 65W Memory: A-DATA 2GB (2 x 1GB) 240-Pin DDR2 800 (PC2 6400) Dual Channel Storage: 2 x Seagate Barracuda 250GB SATA 3.0Gb/s Video: EVGA GeForce 7200GS 256MB GDDR2 PCI-Express x16 LAN: 2 x Intel 10/100/1000Mbs PCI Pro/1000 GT Desktop Adapter OS: Linux/CentOS 5 x86_64 Problem: I have an ASUS M2A-VM motherboard. Appearently it has an ATI SB600 controller on it that is supposed to support RAID1. I have installed 2 Seagate 250G SATA hard drives on this board. I configured the SATA controller to RAID in the BIOS. In the ATI FastBuild utility, I configure the array for RAID1, and assign the 2 hard drives to it. Everything seems to work ok. The OS (Linkux/CentOS 5) installs and runs smoothly. Now my problem... - I disconnect one of the drives (in the FastBuild utility, the drive is labelled 1-2 in the array) - On boot, the controller tells me that the array condition is critical (as expected) - I connect a replacement drive (identical to, but physically different from the one removed) - Once rebooted, I go back into the FastBuild utility (Ctrl-F) there is no option that I see for rebuilding the array to a new drive once a failed drive is replaced. I have tried deleting and redefining the array to include the new drive (without initializing the drives in the array). It does not rebuild the array to the new drive. If I DO initialize the drives in the array, as expected, all data is lost on the "healthy" drive. There seems to be absolutely NO documentation for the SB600 controller. I can find documentation for Promise Technologies, VIA, and Intel controllers. The version of FastBuild in the documentation for those controllers seems to have an Option 5 in the main menu of FastBuild. My version only has 4 options: 1. View Drive Assignments 2. Define Array 3. Delete Array 4. Controller Configuration Options 1 and 4 are informational only. There are no options to set under those two sections. The other 2 are pretty self-explanatory. With the data missing from the replacement drive, I cannot boot into the OS. I get a kernel panic once it tries to mount the filesystems. I shouldn't need to boot into the OS to rebuild the array, right? Questions: Am I missing something? What is the proper procedure to rebuild a RAID array after disk failure/replacement? I have contacted ASUS Tech Support, but all they did was forward me the manual for the RAID controller, which does not cover the procedure to rebuild data on the RAID array.