I built a PC based on an Asus A8N SLi Deluxe motherboard and an AMD Athlon 3500 CPU and running XP Professional. Recently I replaced the 160gb standalone SATA data disk with 2 x Maxtor Maxline 300Gb SATA disks which I made into a mirrored RAID array using the Silicon RAID rather than the Nvidia on the motherboard.
This all worked fine for a couple of months. My Documents, Desktop, Favourites etc were moved onto this array so it contains my data rather than the system. Last week I left the PC on continuously for several days, which is something I don't usually do. I shut the PC down after this time, and the following day on startup, XP failed to recognise the RAID array and hence couldn't find Desktop etc.
After checking the power and data cables to no avail, I went into the RAID BIOS and checked out the logical volume details. It reported the first disks as "Current" and the second disk as "Rebuild". So I rebuilt the array and now all is well again.
I have no idea why the array went wrong like this with brand new disks - and that worries me. But I thought mirrored RAID arrays were supposed to continue functioning when one disk went down. So how come this one didn't show any errors on boot up, and just failed to be recognised?