mtx-changer script does not return from load anymore

Otto Brandstaetter

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Mar 19, 2025, 3:22:44 PM3/19/25

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Hi, I have been using bareos with different hardware since several years - and I have some scripts, for example to re-initialize tapes.

In the past I used for example /usr/lib/bareos/scripts/mtx-changer /dev/sch0 load 8 /dev/tape/by-id/sch0-nst 0 after execution, the next command in the script was executed.

But since somewhen (last year?) after execution the script shows done, but does not exit. Seems to be hardware-independant as I tried with a dell changer and a hpe changer.

I am working on debian 12 with (now) bareos 24, installed it using apt from download.bareos.org/current/Debian_12

Any help would be appreciated as I could not find anything regarding this...

Cheers, Otto

Bruno Friedmann (bruno-at-bareos)

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Mar 20, 2025, 6:18:13 AM3/20/25

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Hi Otto,

Mainly the changes in mtx-changer are in the following commit https://github.com/bareos/bareos/commit/68710b7960

We remove the perl usage in favor of awk and a few cleanup.

But nothing in terms of usage should have changed.

What might have been happened, is that you touch previous version (check also mtx-changer.conf) which would have not been upgraded by the installation package.

Would you mind to check this ?

Regards

Otto Brandstaetter

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Mar 20, 2025, 7:58:38 AM3/20/25

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Hi Bruno,

thanks a lot for your answer. the script was up-to-date but digging a little bit into it made me to set debugging on. then I could see in the log:

20250320-11:53:05 Doing mt -f /dev/tape/by-id/sch0-nst status ...
20250320-11:53:05 /dev/tape/by-id/sch0-nst: No such file or directory

so i looked around a little bit and set the right device, now everything working again, THANKS!

what is a little bit confusing (for me) is that the script did not throw an error or something. I think this would be helpful as one could immediately find out that the device path is not correct.

Best regards and thanks again,

Otto

Bruno Friedmann (bruno-at-bareos)

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Mar 20, 2025, 9:07:14 AM3/20/25

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With debug activated it should have log that in /var/log/bareos/mtx-error.log usually. also it might be in some /var/lib/bareos/mtx-err*

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