Tape positioning error

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Tape positioning error

Veeam Logoby adrien.herve » Mon Feb 22, 2016 7:24 am

Hello guys,

After upgrading from Veeam B&R 8.0.0.2029 to 8.0.0.2084 I'm experiencing weird errors with backup to tape jobs.
All the (full) tape jobs failing with this error message:

Code: Select all
Failed to start new tape backup session: StartSessionTape failed
Failed to prepare to start new tape session: StartSessionTape failed
Failed to prepare to start new tape session: StartSessionTape failed StartSessionTape failed Tape positioning error: An attempt to access data before the beginning-of-medium marker failed


I don't think this KB (https://www.veeam.com/kb2003) is matching my problem. I don't have this issue before and different tapes were used during the backup.
Another strange thing: data seems to be totally transferred on tape, the duration of the job is matching the size of data needs to be writed on tape. The job is failing at the end so I don't know if this is a true or false error.

Support case ID: 01705320

Did somebody is facing the same problem?
Thanks,
Adrien
adrien.herve
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Re: Tape positioning error

Veeam Logoby v.Eremin » Mon Feb 22, 2016 10:19 am

Truth be told we have not seen this issue in a while and the last time it was reported it was environment-specific. So, the best thing you can do is to keep working with support engineer till the root cause is found. Thanks.
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Re: Tape positioning error

Veeam Logoby danc » Mon Feb 22, 2016 11:30 pm

I seem to be getting the same error as well
It seems to happen since I rebooted our Veeam backup server after windows patching which interrupted backups to tape at the time. However, I have not come across this error before.
I did reboot the tape library as well.
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Re: Tape positioning error

Veeam Logoby v.Eremin » Wed Feb 24, 2016 11:59 am

Unfortunately, the case is in French, so, I can't make sense of it. As far as I can tell, the issue is being researched at the moment. So, it might be worth opening your own ticket and making reference to the case mentioned by OP. Thanks.
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Re: Tape positioning error

Veeam Logoby adrien.herve » Mon Feb 29, 2016 3:10 pm 1 person likes this post

Hi guys,

Just to give you a quick feedback the support has fixed this issue last week by publishing a specific Veeam.Backup.Core.dll.
This problem happens in this particular scenario:
- The backup to tape job is using differents media pools for full and incremental backups.
- Full and increments are writing on tape during the same job session.

For the moment there's no fix for V9 only for V8.

Hope this helps,
adrien.herve
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Re: Tape positioning error

Veeam Logoby ccatlett1984 » Sun Mar 13, 2016 5:58 pm

I get this error when it tries to use a bad tape. (We are re-using tapes.)
I am using the same pool for both full's & inc's.

I'll open a case and see if the fixed dll lets me re-use those "bad" tapes.
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[MERGED] An attempt to access data before the beginning-of-

Veeam Logoby pa.it » Mon Mar 14, 2016 8:59 am

We get this error:
Code: Select all
14-03-2016 08:32:16 :: Failed to prepare to start new tape session: StartSessionTape failed StartSessionTape failed
Tape positioning error: An attempt to access data before the beginning-of-medium marker failed

Its stop the job and you shall proteck the tape if you want the job to run again

We are using HP tape and HP MSL6480

Veeam 8 update 3
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Re: An attempt to access data before the beginning-of-medium

Veeam Logoby PTide » Mon Mar 14, 2016 12:47 pm

Hi,

When posting about technical issues please include your case ID. Otherwise your topic can be deleted within 24 hours.

Thank you.
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