Thank you all for your answers and suggestions.
In the meantime I found out that the problem is ... the laser printer that I
printed the labels with. The label format doesn't matter at all.
I printed new labels with an ink jet. Now the recognition is 100%.
Maybe the fixed black toner has a higher reflection and confuses the barcode
reader ...
> Am 03.07.2018 um 15:59 schrieb Wolfgang Denk <w...@denx.de>:
>
> Dear Christoph,
>
> In message <1be9171a-8dd0-48f3-aad5-d4ff9a8b7...@uni-koblenz.de> you wrote:
>>
>> I think I know the answer ("not possible") but maybe someone has an idea:
>
> Right - you cannot (re-) write any data at the start of the tape
> without loing all data after it.
>
>> Some years ago I labeled all my LTO-6 tapes with manual printed
>> stickers "LTO6-###". As you can see, there are 5 alphanumeric
>> characters followed by 3 digits. The barcode standard allows this
>> and my LTO devices never had problems with that kind of labels.
>> My new tape library (Overland Neo Series T48) does. Sometimes it
>> recognises the labels, sometimes not. I think this is because
>> LTO-labels should have max. 3 characters followed by max 3 digits
>> followed by the LTO series number (LTO###L6).
>> I would have no problem in printing new labels, but the tapes have
>> to be physically relabelled. Is it possible without loosing the
>> tape data? (no).
>
> No, this cannot be done. At best, you can relabel the tapes when
> you re-use them, i. e. when you rewrite all of the content anyway.
>
>> Any other ideas how to switch my old tapes to the new label scheme?
>
> Well... who really needs the barcode labels to be exactly the same as
> the on-tape and in-database labels? I think this is just for your
> own convenience, so you can match the "mtx status" output and bacula
> messages against the physical label on the tapes.
>
> But then - in your old labels, the "LTO" part is redundant at least,
> and you don't really need it to identify a tape if it's the same on
> all tapes. If I were you, I would just print new bracode labels,
> and omit the "LT" part. i. e., instead of "LTO6-###" you get
> "O6-###L6". Then you can still easily match the "real" label to the
> barcode stickers, and don't have to change anything software-wise.
>
> And the "O6-" prefeix could even be explained as "old LTO6 label"
> format :-)
>
> [Of course, you should not attempt to use this with a "label ...
> barcodes" command and result in the old tape names; but I guess for
> new tapes you would switch to a new label scheme anyway.]]
>
> Hope this helps.
>
> Viele Grüße,
>
> Wolfgang Denk
>
> --
> DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de
> The ultimate barrier is one's viewpoint.
> - Terry Pratchett, _The Dark Side of the Sun_
--
Freundliche Grüße
Christoph Litauer
_________________________________________
Uni Koblenz, Rechenzentrum, Raum A 022
Postfach 201602, 56016 Koblenz
Fon: +49 261 287-1311, Fax: -100 1311
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