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NDMP Backups keep failing, then restarting: ERR - Cannot write TIR data to media, NDMP return code 20

dukbtr
Level 4

‎07-13-2009 08:23 AM

Here is the error that we keep getting.

Details from activity monitor:

07/12/2009 17:42:59 - Error bptm (pid=11132) ERR - Cannot write TIR data to media, NDMP return code 20.
07/12/2009 17:43:06 - end writing; write time: 3:27:30
media write error (84)

Snippet from ndmpagent log:

13:29:50.061 [9964] <16> NdmpMoverClient: ERROR Write - Failed due to internal error
13:29:50.166 [9964] <2> db_error_add_to_file: dberrorq.c:midnite = 1247198400
13:29:50.167 [9964] <16> write_data_tir: ERR - Cannot write TIR data to media, NDMP return code 20.
13:29:50.167 [9964] <2> send_MDS_msg: DEVICE_STATUS 1 42201 bkupmstr LT0095 4000162 bkupmstr.hcart3.vtl01.ndmp.002 2000304 WRITE_ERROR 0 0
13:29:50.202 [9964] <2> log_media_error: successfully wrote to error file - 07/10/09 13:29:50 LT0095 17 WRITE_ERROR bkupmstr.hcart3.vtl01.ndmp.002
13:29:50.202 [9964] <2> check_error_history: just tpunmount: called from bptm line 22831, EXIT_Status = 84


It happens on multiple policies.

We are backing up an EMC NAS and the backups are going to an EMC DL3D 3000 VTL (Virtual LTO3).

NetBackup 6.5.3.1
HP-UX IA64 11.23

The above is the NDMP agent host and the backups are direct (not 3 way).

Thx



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1 REPLY 1

John_Stockard
Level 5
Partner Certified

‎07-13-2009 11:37 AM

I would recommend opening a support case with Symantec for this issue.  It sounds like it could be a bug in either NetBackup or in the particular version of the DART OS running on your EMC Celerra.

I found a Symantec technote that describes similar behavior:
http://seer.entsupport.symantec.com/docs/321567.htm

Also double-check the compatibility list on Symantec's website to make sure that the firmware versions on your EMC DL3D 3000 VTL and your EMC Celerra are supported with NetBackup 6.5.3.1 and your HP-UX 11.23 media server. 

According to the compatibility list, Symantec has verified that the EMC DL3D series of VTLs works with NetBackup 6.x and HP-UX 11.23 media servers if the EMC DL3D is running the 1.0 firmware or higher and the virtual tape drives are emulating an IBM TotalStorage Ultrium-3 T800F tape drive.

It also says that your EMC Celerra needs to be running one of the following versions of DART:
  • 5.1.23.0 or higher
  • 5.2.11.3 or higher
  • Any version of 5.3
  • 5.4.18 or higher
  • 5.5.19 or higher
  • 5.6.36-4 or higher
If you're running an older version of DART that's not on the list (such as 5.6.x prior to 5.6.36-4), you should work with EMC to get your Celerra's firmware upgraded.
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