Ivan has a 2 drive NAS that has files he needs, but the RAID 1 hard drive are reading as corrupted. He believes it is the corruption of one, synced to the other. Leo says that the hardware is probably fine, there's just corruption in the files themselves. But it could be a physical issue making it worth using SpinRite to repair it. However, if the corruption has spread, that points to a software error in the files, not the hardware itself.
Adam wants to create a new RAID 5 array, but his current RAID 1 system went belly up as he was converting to RAID 5. Can he get his data back? Leo says probably not through the RAID itself. He could take one drive out and try to recover, but Adam may have been too deep in the conversion process to restore the data. But the good news is, that he can take the drive out and plug it into the existing PC and see the data. If the data is mirrored, it should be easy to recover with a utility like Recuva. EaseUS also has a free drive recovery tool. He can probably use those to see the files.
Jake swapped out his smaller SSD with a larger one on his computer. Leo says that Jake could just keep that drive as his software only drive and then use the larger drive for data. He could even combine multiple drives into a RAID for redundancy. He should keep in mind that using RAID 0 may be fast, but it's also less reliable because if one drive fails, it all fails. RAID 1 would give him data security by making multiple copies of the same data. RAID 5 is what is common now, and that offers the best of both worlds.
Gene replaced a network drive on RAID 1 and when it rebuilt the RAID, it made all the drives blank! Leo says that RAID 1 (mirrored) is designed to write the same data to all drives and when one fails, it can rebuild the RAID from the other drives. Leo thinks that during the rebuild of the RAID, the drives were erased. It's not the same as partitioning and setting up, and it may not be recoverable. Leo doesn't think it's a good idea to run BIOS RAID. It's not a good choice and RAID is never a substitute for backing up. He should also make sure he replaced the correct drive.