SalvationData Data Recovery System User Manual page 19

 ERR: red for error occurs while reading/writing data from/into source drive and it
will be recorded into error count of HDD basic information.
 DSC: Drive Seek Complete, green for source drive pre-inspection passed and
seek complete.
 DRQ: Drive Request status, green for source drive receiving information
exchange.
 CRR: Correction, red for data modified/corrected.
 IDX: Indexing files
 ERRC: Error of Command sending, red for error occurs while sending command
to the drive.