DAT - Hardware compression DAT

[Andersen]

Thanks for sharing your experiences. I will consider replacing the set of tapes with fresh ones. What puzzles me is that the error seems to pop up near the end of the tape. I would expect tape wear and stretch to be most prominent in most frequently used part of the tape - i.e. the beginning rather than the end.

I also looked for hardware upgrading to the DAT160 but I am not sure if they can be used with the NT4.0SP6 Server.

http://h10010.www1.hp.com/wwpc/us/en/sm/WF06b/12169-304612-3446234-3446234-3446234-63890-3542583-3542584.html

[Andersen]

So I decided to replace all cartridges in my working set. As can seen from the TapeWare log below the behavior remains.
Attached is also a recent LTT support ticket which seems to confirm the amount of written data (22.7GB)

Any suggestions to what I can do with a drive that seems to be full when only 22GB is written?

Thanks again for reading and replying.


===============================================================================
Job Backup af E: og G:
===============================================================================

Summary
-------------------------------------------------------------------------------
Job Type : Backup Job
Number of Passes : 3
Logging Mode : Failed Objects Only
Backup mode : Full
Change mode : Skip device
Write Mode : Overwrite all Media
Auto Format Mode : Auto Format Blank Media
Verify Mode : Full Data Verification

Job Start Time : 14-Jun-2010 07:00 PM
Selecting Objects : Start 14-Jun-2010 07:00:03 PM
Selecting Objects : End 14-Jun-2010 07:04:42 PM
Backup First Objects : Start 14-Jun-2010 07:04:42 PM
Backup First Objects : End 14-Jun-2010 07:04:43 PM
Backup Begin Objects : Start 14-Jun-2010 07:04:43 PM
Backup Begin Objects : End 14-Jun-2010 07:04:43 PM
Backup Pass 1 : Start 14-Jun-2010 07:04:43 PM
:
: Disaster Recovery information has been saved for
: Host : SERVER
: Device : Dev-1.0.3.0: HP C7438A
: Media : Mandag_L
:
:
: ALERT: Warning 1301 : TapeAlert - Warning - Write
:
: Backup af E: og G:
: Dev-1.0.3.0: HP C7438A
: Mandag_L
:
: The tape drive is having problems writing data. No data
: has been lost, but there has been a reduction in the
: capacity of the tape.
:
:
: ALERT: Error 1303 : TapeAlert - Critical - Media
:
: Backup af E: og G:
: Dev-1.0.3.0: HP C7438A
: Mandag_L
:
: Your data is at risk: 1. Copy any data you require from
: this tape. 2. Do not use this tape again. 3. Restart
: the operation with a different tape.
:
Job End Time : 14-Jun-2010 11:36 PM

Effective Throughput : 1424 Kbytes/Second
: 83 Mbytes/Minute

Selected Objects : 158509
Selected Size : 34566834 Kbytes
Completed Objects : 133518
Completed Size : 23625062 Kbytes
Failed Objects : 0
Failed Size : 0 Kbytes

Job Terminated with Error:
76 : Operator cancel

Details
-------------------------------------------------------------------------------
Streams : SERVER\System State
: Selected Objects : 3
: Selected Size : 9996 Kbytes
: Completed Objects : 0
: Completed Size : 0 Kbytes
: Object Warnings : 0
: Object Warnings : 0 Kbytes
: SERVER\E:
: Selected Objects : 70639
: Selected Size : 20284566 Kbytes
: Completed Objects : 56851
: Completed Size : 10832391 Kbytes
: Object Warnings : 0
: Object Warnings : 0 Kbytes
: SERVER\G:
: Selected Objects : 87866
: Selected Size : 14272271 Kbytes
: Completed Objects : 76667
: Completed Size : 12792670 Kbytes
: Object Warnings : 0
: Object Warnings : 0 Kbytes
: SERVER\TapeWare Storage Server Database
: Selected Objects : 1
: Selected Size : 0 Kbytes
: Completed Objects : 0
: Completed Size : 0 Kbytes
: Object Warnings : 0
: Object Warnings : 0 Kbytes
Media : Home\Admin Folder\Mandag_L
: Completed Objects : 133518
: Completed Size : 23625062 Kbytes
Devices : Dev-1.0.3.0: HP C7438A

[Andersen]

Follow up: Based on your comments on the support ticket I contacted HP support. The drive was replaced without discussion within 2 days. The backup now seems to complete as I would expect so it was an issue within the drive. Thank you very much for answering to my thread and helping me out and to HP for providing good service.