I also use software RAID. Nevertheless, it's not infallible. Recently a disk in one of the arrays went down, it got quickly replaced, but the server wouldn't bo

I also use software RAID. Nevertheless, it's not infallible. Recently a disk in one of the arrays went down, it got quickly replaced, but the server wouldn't boot. I had to connect via console and reinstall Grub - only then would the server boot and rebuild the array. A few weeks ago three disks failed at once. In cases like this the parent's notebook will be of limited use. In my experience traditional disks fail every 3-5 years - it's not something you can avoid.