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 22.214.171.124 (OS-Solaris10).
The fix is in 126.96.36.199 as well:
there must be drive flactuation. Also check drive readibilty. try to clean the drive.