Tape job failes with: Unknown MTF Header Unknown MTF Writer

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Re: Tape job failes with: Unknown MTF Header Unknown MTF Wri

Veeam Logoby Danne84 » Thu Feb 18, 2016 8:53 pm

Sure.

I am using Dell PowerVault 110T. The drive inside is IBM Ultrium-TD3
Was using the same unit/drive, cables and so on when doing the test.
Have erased 7 tapes in a row without problems in VBR 8.0 U3.
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Re: Tape job failes with: Unknown MTF Header Unknown MTF Wri

Veeam Logoby v.Eremin » Wed Feb 24, 2016 11:56 am 1 person likes this post

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[MERGED]"Unknown MTF Writer" error when erasing

Veeam Logoby jwchatm » Mon Mar 07, 2016 12:42 pm

Support Case # 01711117

We recently upgraded our Veeam Backup & Recovery 8.0 server to version 9.0.
Now we are having an odd issue. Tapes that have been used in our Symantec Backup Exec library will not inventory or erase. I have attempted multiple times and even gone so far as to mark them as "free" and still they fail during inventory or erase jobs. They do not overwrite during backup job processing either. These tapes are essentially orphaned. This was an issue with Veeam Backup & Recovery 8.0 but was rectified with the "Update 2B"
patch. This does not appear to have carried over to Veeam 9.0. Has anyone else experienced this and is there a known workaround? I don't want to waste more new tapes while we wait for the next patch, especially where we don't know when that patch is to be released, or whether or not it addresses this issue. Help!
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Re: Tape job failes with: Unknown MTF Header Unknown MTF Wri

Veeam Logoby Dima P. » Mon Mar 07, 2016 10:44 pm

Hello John,

I believe, the Update 1 with the included fix should be available at support side at the beginning of the next week. As a temporary workaround you may try to erase the said media with the native vendor’s tools.
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Re: Tape job failes with: Unknown MTF Header Unknown MTF Wri

Veeam Logoby Aerospace » Tue Mar 08, 2016 7:52 am

To Fix this Error "Unknown MTF Writer" write a little File to this tapes, after that you can erase/Incentory/catalog the tapes. - Worked for me...
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Re: Tape job failes with: Unknown MTF Header Unknown MTF Wri

Veeam Logoby Dima P. » Tue Mar 08, 2016 2:54 pm

Martin,

Good idea to test but I guess, at some point you can’t start writing to tape unless it sits in unrecognized media pool before performing the erase. We will test this solution, meanwhile we should have Update 1 available at the support team very soon (support should start a pilot deployments next week if I am not mistaken).
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Re: Tape job failes with: Unknown MTF Header Unknown MTF Wri

Veeam Logoby Aerospace » Tue Mar 15, 2016 9:57 am

i think i have move it manuelly in the free MediaPool and than it works, but it was some weegs ago.
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[MERGED] Cannot erase tapes with "Unknown WTF writer" error

Veeam Logoby mroushdy » Sun Jun 19, 2016 2:09 pm

Hello,

I am a Veeam partner and I am testing something for one of my clients, so there's no support case ID.

I am using V9 with a stand alone HP LTO4 drive, I am tryig to reuse tapes written by Symantec BackupEXEC but I get the error mentioned in the thread subject.

Thanks for helping me
Mohamed Roushdy
IT Systems Engineer | vEXPERT | VCP | MCSA
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Re: Tape job failes with: Unknown MTF Header Unknown MTF Wri

Veeam Logoby Shestakov » Sun Jun 19, 2016 9:03 pm

Hello Mohamed,
What product version are you using, v9 or v9u1?
Thanks!
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