Re: [Bacula-users] Problem with missing EOD/EOF on LTO-5 Tape

[Alan B. <a....@uc...>]

On 25/02/2021 16:01, Christian Lehmann wrote:
> Hi Alan,
>
> not sure how to answer your question as I do not understand it *sorry*
>
> How can I find out?
>

lsmod | grep st

lsmod | grep lin


These are kernel modules and they will not coexist in the same machine,
you need to use one or the other


Bacula relies on the ancient and crifty "st" (scsi tape) driver and WILL
NOT WORK with the IBM/HP "lin_tape" driver, despite these being the
recommended and documented things to install if you're using changers
with IBM or HP drives


HOWEVER: If you have a FC or SAS fabric environment, lin_tape is the
ONLY manufacturers supported way of operating correctly.


"st" works in a fabric - kind of. Each scsi initiator is treated as a
separate device for setting scsi locks, so if the path changes there's a
reasonable chance that bacula can no longer eject tapes and the entire
system falls down around your ears


The actual problem with lin_tape is that it returns an "error code 0 -
sucess" for various operations (typical IBM style) which bacula doesn't
know how to cope with and treats as a fatal error


I raised this with Baculasystems as a bug more than 10 years ago and
have been blown off on it every time it's been raised

Bareos fixed this this a long time ago, which shows up bacula developers
claiming "It's too hard to fix it"