Can you explain me what does mean numbers in fourth column in /usr/openv/netbackup/db/media/errors ?

 

                                            *

01/16/07 17:07:19 DFY079 2 WRITE_ERROR HP.SDLT600.002
01/17/07 00:02:32 DFY076 0 POSITION_ERROR HP.SDLT600.000
01/17/07 00:08:53 DFY079 6 WRITE_ERROR HP.SDLT600.006
01/17/07 05:00:56 DFY076 1 POSITION_ERROR HP.SDLT600.001
01/17/07 06:33:04 DFY076 5 POSITION_ERROR HP.SDLT600.005
02/07/07 00:03:27 DFY076 3 POSITION_ERROR HP.SDLT600.003
02/07/07 04:06:23 DFY076 4 POSITION_ERROR HP.SDLT600.004
02/07/07 06:32:32 DFY076 2 POSITION_ERROR HP.SDLT600.002
03/05/07 02:50:31 DFY070 6 WRITE_ERROR HP.SDLT600.006
                                            *

 

Thanks.