Why is there a dm-raid array in MBL?

Haidube wrote:

 So if there was a potential data corruption, it’s most likely to corrupt both partitions in the same way, agreed?

it’d be nearly impossible for both partitions to be corrupted.  That’s the whole point of RAID to begin with.

And don’t EVER confuse RAID with a “backup.”   They are NOT the same thing.  ;)

What if the drive developed a bad sector, preventing a READ?  … and what if that bad sector was in the kernel?  Since only the kernel has the capabilities of changing boot loaders, how would it boot?   From where would it get its instructions to drop the “bad” partition and retry with the “good” partition?