“Your Device Has RAID Configuration Issues” – How?
The error message our client saw in this WD MyBook Duo data recovery case should rightly bewilder anyone who is even vaguely familiar with how RAID-1 works.
MyBook Duo external hard drives support two levels of RAID. One is RAID-0, which combines two or more hard drives into a single logical volume by “striping” them together. In a RAID-0 setup, each individual drive only has fragments of the whole. All of the data you write to it gets chopped up and redistributed. If you look at each individual drive separately, all you see is garbled gibberish.
The RAID configuration keeps track of how all that data is distributed. If the configuration has issues with a RAID-0 array, it’s easy to see that this makes your data look like it’s been fed through a paper shredder.
But RAID-1 is different. A RAID-1 array takes two hard drives and “mirrors” them, making one an exact duplicate of the other. There’s no striping, no data redistribution. You should be able to pull one drive out of a RAID-1 storage device and look at it as an individual and see the exact same stuff you’d see if you kept the drive in its enclosure with its twin. Here, the RAID configuration shouldn’t matter all that much.
Had something gone wrong with the hard drives or the MyBook Duo enclosure to make the RAID configuration “forget” that the drives in this device enclosure were set up as a RAID-1 mirrored array?