You should be able to remove the Faulty SATA HDD and it should show the good drive with all of the data. If the Corrupted Drive was the Primary drive and not the mirror then the Healthy drives files will be corrupted too. Since you just got started, I would get Two good SATA drives, that are the exact same size capacity, and rebuild your array. Then try copying your files again.

 

If the Corrupted Drive was the Primary drive and not the mirror then the Healthy drives files will be corrupted too.

I replaced the drive, since it was a new server we didn't lose anything important. But I think what you are trying to say if disk 3 is a mirror of disk 2 then in case if disk 2 fails then the data on disk 3 will be corrupted? Is that happened with me too?

 

If Drive 2 had several Bad Sectors to begin with, and you made a RAID 1 mirror with Drive 3. And if Drive 2 was the Primary drive in the Mirror, and you save files to the Corrupted drive, it would mirror the corrupted files onto Drive 3. Replacing Drive 2 at this point would rebuild the corrupted data back to the new Drive 2

 

That make sense but my question is if an existing primary drive (already in mirror) got bad sectors than what?

 

If there are a few bad sectors, you can run Check Disk on the drive. It will try and Fix the drive (eg) move the files from the Bad Sectors to a Good Sector in the Cluster and marking the sectors bad and not saving files to that area any longer. If there are too many bad sectors or a Bad Cluster, the files will be corrupted, as in your case, and the drive will need to be replaced.