Tape drive serial number mismatch

Hi All,

We have one of the Oracle/Sun SL500 connected to one of our Solaris 10 media server.

We have 18 drivers in total out of which 14 are LTO3 and 4 are LTO4 drives

We recently had 9 of our drives failed due to bad media supply and they were replaced.

We added the new drives by following

http://www.symantec.com/business/support/index?pag...

There is a serial number mismatch for 10 LTO3 drivrs. The serial numbers in SL Console ( Sun Library Console) and NetBackup  admin console are different.

The backups are working fine with mismatched serial numbers but my question is when backups are working fine why serial numbers are not updated in netbackup.

Please guide.