Status 84 media write error on NBU 7.5

 2 node clustered master server running nbu 7.5 on rhel6. 4 other media servers.

currently having an issue with tape backups. its a new setup and not in production. i recently installed evrything. i tested my disk backups and they ran successful and the test was to backup one of the filesystem of the media server. i had no issues backing up one of the media server. i dont have any client currentlty in the environment.

the topology of the environment is to have the tape backups only from the clustered master server. and all disk backups from the media server.

01/25/2013 13:51:17 - Info nbjm (pid=28809) starting backup job (jobid=14) for client media01.domain.com, policy policy_1_asp, schedule tmp_bkup
01/25/2013 13:51:17 - Info nbjm (pid=28809) requesting STANDARD_RESOURCE resources from RB for backup job (jobid=14, request id:{F744DA40-6730-11E2-BCAD-2D8C392DDC40})
01/25/2013 13:51:17 - requesting resource nbu-hcart2-robot-tld-0
01/25/2013 13:51:17 - requesting resource nbu.domain.com.NBU_CLIENT.MAXJOBS.media01.domain.com
01/25/2013 13:51:17 - requesting resource nbu.domain.com.NBU_POLICY.MAXJOBS.policy_1_asp
01/25/2013 13:51:18 - Info bpbrm (pid=29725) media01.domain.com is the host to backup data from
01/25/2013 13:51:18 - Info bpbrm (pid=29725) reading file list from client
01/25/2013 13:51:18 - Info bpbrm (pid=29725) starting bpbkar on client
01/25/2013 13:51:18 - Info bpbkar (pid=49560) Backup started
01/25/2013 13:51:18 - Info bpbrm (pid=29725) bptm pid: 29727
01/25/2013 13:51:18 - granted resource  nbu.domain.com.NBU_CLIENT.MAXJOBS.media01.domain.com
01/25/2013 13:51:18 - granted resource  nbu.domain.com.NBU_POLICY.MAXJOBS.policy_1_asp
01/25/2013 13:51:18 - granted resource  M00001
01/25/2013 13:51:18 - granted resource  Drive000
01/25/2013 13:51:18 - granted resource  nbu-hcart2-robot-tld-0
01/25/2013 13:51:18 - estimated 0 kbytes needed
01/25/2013 13:51:18 - Info nbjm (pid=28809) started backup (backupid=media01.domain.com_1359147078) job for client media01.domain.com, policy policy_1_asp, schedule tmp_bkup on storage unit nbu-hcart2-robot-tld-0
01/25/2013 13:51:18 - started process bpbrm (pid=29725)
01/25/2013 13:51:18 - connecting
01/25/2013 13:51:18 - connected; connect time: 0:00:00
01/25/2013 13:51:19 - Info bptm (pid=29727) start
01/25/2013 13:51:19 - Info bptm (pid=29727) using 65536 data buffer size
01/25/2013 13:51:19 - Info bptm (pid=29727) using 30 data buffers
01/25/2013 13:51:19 - Info bptm (pid=29727) start backup
01/25/2013 13:51:19 - Info bptm (pid=29727) backup child process is pid 29737
01/25/2013 13:51:19 - Info bptm (pid=29727) Waiting for mount of media id M00001 (copy 1) on server nbu.domain.com.
01/25/2013 13:51:19 - mounting M00001
01/25/2013 13:52:04 - Info bptm (pid=29727) media id M00001 mounted on drive index 0, drivepath /dev/nst3, drivename Drive000, copy 1
01/25/2013 13:52:04 - mounted M00001; mount time: 0:00:45
01/25/2013 13:52:04 - positioning M00001 to file 1
01/25/2013 13:52:53 - Error bptm (pid=29727) write error on media id M00001, drive index 0, writing header block, Input/output error
01/25/2013 13:52:53 - Info bptm (pid=29727) EXITING with status 84 <----------
01/25/2013 13:52:53 - Error bpbrm (pid=29725) from client media01.domain.com: ERR - Cannot write to STDOUT. Errno = 104: Connection reset by peer
01/25/2013 13:52:54 - Info bpbkar (pid=49560) done. status: 84: media write error
01/25/2013 13:52:54 - end writing
01/25/2013 13:53:38 - job 14 was restarted as job 15
media write error  (84)

logs to be posted in the following post. if any required. like bptm. bpbrm. bpbkar.