For eSATA/USB2.0 model (RS-M2TS or RS-M2TS-E), it is at rebuild status when: the Blue LED of both the source and target HDD are on, the Green LED of the source HDD is on, or the Green LED of the target HDD is blinking.



For the USB 2.0 model (RS-M2UF) and USB2.0/1394b model (RS-M2BF), it is at rebuild status when: the Blue LED of both source and target HDDs are blinking ot the Red LED of the target HDD is on.



For data rebuilt speed, the entire DataWhale series can rebuild 100GB of data in an hour. For example, if the HDD capacity is 500GB, it will take 5 hours to rebuild. After completion of rebuilt, all the LEDs will automatically turn off.