I've built a RAID 1 array of 2 disks, A and B.
That means that every bit on A is equal to a bit on B. If one disk fails, I can safely retrieve my data from the other disk. But then I started wondering: How true is this?
Let's say a bit 1 on A reads 0, but 1 on B. How would the RAID controller be able to tell, which one is corrupted and which one is not? Is this based on what the so called "S.M.A.R.T." technology reports, and is that really worth anything, or would I be just as well of with a non-RAID solution?
I can see why this is not a problem on RAID 5, so I'm planning to upgrade.