What happens when a RAID drive fails?
Posted on 2008-10-01
I've never actually had a situation where a drive as part of a RAID array has failed in a server. So, suppose one of the drives in the RAID 1 mirror in one of my HP ProLaint ML110s (please don't comment about how the "decent ProLiants start at ML370" - this particular server is for a small network with limited funds) failed, what would happen?
Secondly, if a drive did fail, I assume I'd obviously need to use some tool to determine which drive has failed, and replace it. Would I need to initialize the new drive once it is installed? I am assuming it needs to be made a part of the appropriate RAID array, but after this stage, I assume the data will be rebuilt from the remaining drive?
We are talking hardware RAID here - configured in the RAID configuration pages available when the server boots through the BIOS screens.