What happens when RAID goes wrong?
Be sure to watch part 1 first so this video makes sense as to what we're doing! This video picks up where the other one leaves off.
In this video we introduce some failures in disk arrays in order to see how the different setups react.
We start by looking at what happens with a hardware raid controller. Are errors detected? Reported? Corrected/correctable?
We looked at Linux's Multi-Device (md) raid in Part 1 -- now we're going to redo our test procedure from that with a hardware raid controller (with BBU) and then do the same with a two-drive BTRFS array.
We're going to introduce some errors and see how each of these respective multi-disk technologies reports and/or recovers from that situation.