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Why verification failed after swapping a new tape drive of exactly the same by using Veritas 8.6 in Windows 2000 server ?

Posted on 2006-11-08
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Last Modified: 2013-12-01
Hi,

I found our daily Veritas backup exec log contains verification error after swapping a new tape drive in replace of the out of order one.  

We use Veritas backup exec version 8.6 under Window 2000 server sp4.  After our HP tape drive get out of order, we replace it with a new one of exactly the same, same brand, same model.

But after that, nightmare come.  The backup ended with error.  Though we found that the backup works correctly and can also be restored without any problems, but the verification process after the back do failed which make our operation manager feel extremely uncomfortable.

Our backup job consist of 2 individual tasks.  The entire system backup start at 2:00am everyday with no tape reject after that.  While the second one (using the same tape) started at 3:00am and is backing up of some special critical files after the full backup started in 2:00am.  The second job do reject the tape after backup.  What the 2 backup task do get files from the local server without any network elements involved.  The tape used will be formated by operator everyday at noon manually and all our tape are quite new and should not have any quality problems.

The log do show that the tape drive does not contain a storage media.  But the actual case is the tape do still resided in the tape drive when the verification started.

I here attached the log for your reference and advise.  Thanks.



The log for the job started at 2:00am (full backup)
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

======================================================================
Job server: HKTREASURY
Job name: FULL_HKTREASURY
Job started: 2006年11月7日 at 上午 02:00:01
Job type: Backup
Job Log: BEX53.txt
======================================================================

Drive and media information from media mount:
Robotic Library Name:
Drive Name: HP 1
Slot: 0
Media GUID: {859C9068-68A1-4ED6-80CF-18CF6F277C68}
Media Label: Treasury123
Overwrite Protection Time Left: None
Append Time Left: Infinite
Targeted Media Set Name: Media Set 1

======================================================================
Job Operation - Backup
Media operation - overwrite.
Hardware compression enabled.
======================================================================
OFO: Started for device: "C:"


Media Name: "Media created 2006/11/7 02:00:01 上午"
Backup of "C: Win2000"
Backup set #1 on storage media #1
Backup set description: "FULL_HKTREASURY"
Backup Type: FULL - Back Up Files - Reset Archive Bit
Backup started on 2006/11/7 at 02:01:23 上午.
The .DR file required for Intelligent Disaster Recovery is created/updated

Backup completed on 2006/11/7 at 02:18:21 上午.
Backed up 52027 files in 1251 directories.
Processed 2,885,273,159 bytes in  16 minutes and  58 seconds.
Throughput rate: 162.2 MB/min
----------------------------------------------------------------------
OFO: Started for device: "D:"


Media Name: "Media created 2006/11/7 02:00:01 上午"
Backup of "D: 新增磁碟區"
Backup set #2 on storage media #1
Backup set description: "FULL_HKTREASURY"
Backup Type: FULL - Back Up Files - Reset Archive Bit
Backup started on 2006/11/7 at 02:18:33 上午.
The .DR file required for Intelligent Disaster Recovery is created/updated

Backup completed on 2006/11/7 at 02:31:38 上午.
Backed up 9824 files in 638 directories.
Processed 3,834,800,119 bytes in  13 minutes and  5 seconds.
Throughput rate: 279.5 MB/min
----------------------------------------------------------------------
OFO: Started for device: "E:"


Media Name: "Media created 2006/11/7 02:00:01 上午"
Backup of "E: 新增磁碟區"
Backup set #3 on storage media #1
Backup set description: "FULL_HKTREASURY"
Backup Type: FULL - Back Up Files - Reset Archive Bit
Backup started on 2006/11/7 at 02:31:46 上午.
The .DR file required for Intelligent Disaster Recovery is created/updated

Backup completed on 2006/11/7 at 02:50:19 上午.
Backed up 90 files in 25 directories.
Processed 7,099,481,582 bytes in  18 minutes and  33 seconds.
Throughput rate: 365.0 MB/min
----------------------------------------------------------------------
OFO: Started for device: "G:"


Media Name: "Media created 2006/11/7 02:00:01 上午"
Backup of "G: 新增磁碟區"
Backup set #4 on storage media #1
Backup set description: "FULL_HKTREASURY"
Backup Type: FULL - Back Up Files - Reset Archive Bit
Backup started on 2006/11/7 at 02:51:00 上午.
The .DR file required for Intelligent Disaster Recovery is created/updated

Backup completed on 2006/11/7 at 02:58:57 上午.
Backed up 25 files in 9 directories.
Processed 3,269,115,644 bytes in  7 minutes and  57 seconds.
Throughput rate: 392.2 MB/min
----------------------------------------------------------------------

Media Name: "Media created 2006/11/7 02:00:01 上午"
Backup of "\\HKTREASURY\System?State "
Backup set #5 on storage media #1
Backup set description: "FULL_HKTREASURY"
Backup Type: FULL - Back Up Files - Reset Archive Bit
Backup started on 2006/11/7 at 02:59:00 上午.
The .DR file required for Intelligent Disaster Recovery is created/updated

Backup completed on 2006/11/7 at 03:00:10 上午.
Backed up 1892 files in 81 directories.
Processed 246,905,792 bytes in  1 minute and  10 seconds.
Throughput rate: 201.8 MB/min
----------------------------------------------------------------------

======================================================================
Job Operation - Verify
======================================================================

Verify of "C: Win2000"
Backup set #1 on storage media #1
Backup set description: "FULL_HKTREASURY"
Verify started on 2006/11/7 at 03:01:11 上午.
Validating media data structures only, no CRC checksums present in this set.
HP 1 does not contain a storage media.
^ ^ ^ ^ ^

Verify completed on 2006/11/7 at 03:01:14 上午.
Verified 11 files in 1 directory.
0 files were different.
Processed 0 bytes in  3 seconds.
Throughput rate:  0.0 MB/min
----------------------------------------------------------------------

======================================================================
Job ended: 2006年11月7日 at 上午 03:01:14
Job completion status: Failed
======================================================================

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-




The log for the job started at 3:00am (critical files backup)
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

======================================================================
Job server: HKTREASURY
Job name: sam_HKTREASURY
Job started: 2006年11月7日 at 上午 03:00:02
Job type: Backup
Job Log: BEX54.txt
======================================================================

Drive and media information from media mount:
Robotic Library Name:
Drive Name: HP 1
Slot: 0
Media GUID: {859C9068-68A1-4ED6-80CF-18CF6F277C68}
Media Label: Treasury123
Overwrite Protection Time Left: None
Append Time Left: Infinite
Targeted Media Set Name: Media Set 1

======================================================================
Job Operation - Backup
Media operation - append.
Hardware compression enabled.
======================================================================
OFO: Started for device: "C:"


Media Name: "Media created 2006/11/7 02:00:01 上午"
Backup of "C: Win2000"
Backup set #6 on storage media #1
Backup set description: "sam_HKTREASURY"
Backup Type: FULL - Back Up Files - Reset Archive Bit
Backup started on 2006/11/7 at 03:02:46 上午.

Backup completed on 2006/11/7 at 03:02:56 上午.
Backed up 7 files in 10 directories.
Processed 42,873,206 bytes in  10 seconds.
Throughput rate: 245.3 MB/min
----------------------------------------------------------------------
OFO: Started for device: "D:"


Media Name: "Media created 2006/11/7 02:00:01 上午"
Backup of "D: 新增磁碟區"
Backup set #7 on storage media #1
Backup set description: "sam_HKTREASURY"
Backup Type: FULL - Back Up Files - Reset Archive Bit
Backup started on 2006/11/7 at 03:03:05 上午.

Backup completed on 2006/11/7 at 03:03:08 上午.
Backed up 1 file in 7 directories.
Processed 9,326 bytes in  3 seconds.
Throughput rate:  0.2 MB/min
----------------------------------------------------------------------

======================================================================
Job Operation - Verify
======================================================================

Verify of "C: Win2000"
Backup set #6 on storage media #1
Backup set description: "sam_HKTREASURY"
Verify started on 2006/11/7 at 03:03:20 上午.
Validating media data structures only, no CRC checksums present in this set.
HP 1 does not contain a storage media.
^ ^ ^ ^ ^

Verify completed on 2006/11/7 at 03:03:25 上午.
Verified 5 files in 10 directories.
0 files were different.
Processed 0 bytes in  5 seconds.
Throughput rate:  0.0 MB/min
----------------------------------------------------------------------

======================================================================
Job ended: 2006年11月7日 at 上午 03:04:29
Job completion status: Failed
======================================================================

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-


Can anyone help on this ?  Thanks.

Cheers
Stanley
0
Comment
Question by:StanleyLMW
2 Comments
 
LVL 6

Accepted Solution

by:
Mnf earned 500 total points
ID: 17906016
"Validating media data structures only, no CRC checksums present in this set. "
The message informs the backup operator that the Cyclic Redundancy Check (CRC) has not been enabled under the Backup Job Properties in VERITAS Backup Exec (tm). If this option is not selected, backup performance may be improved, but there will be no way to verify the integrity of the data on the tape. Backup Exec will only be able to verify that the data can be

look at here
http://seer.support.veritas.com/docs/233092.htm
0
 

Author Comment

by:StanleyLMW
ID: 17912557
Hi Mnf,

Let me try it tonight and get back to you afterward.  Thx.

Cheers
Stanley
0

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