Applies to E-Series Answer As long as the drive is in a failed state you can replace the drive. If the drive is in copyback status you will have to stop the copyback process before failing the drive. ...Applies to E-Series Answer As long as the drive is in a failed state you can replace the drive. If the drive is in copyback status you will have to stop the copyback process before failing the drive. Additional Information additionalInformation_text