One netapp volume(NDMP) backup is failng with error 84 and in details logs it is showing the message " FREEZING media id XXXXX, too many data blocks written, check tape/driver block size configuration" we are using netbackup 188.8.131.52 (OS-Solaris10).
The fix is in 184.108.40.206 as well:
there must be drive flactuation. Also check drive readibilty. try to clean the drive.