On 20/09/13 13:22, Andreas Koch wrote:
>
> Many thanks for the data point! When we use Bacula (not just btape) with
> larger block sizes (512 KB), our backups abort when bacula fails to read the
> tape's header block.
>

Did you attempt to mix blocksizes on the same physical tape?

That will not work. If you change block sizes all existing tapes holding 
data must be marked "used" and new ones labelled.

I run 2Mb block size quite happily on HP LTO5 drives and have done for a 
few years. They are capable of 16Mb - we are limited to 2Mb by Bacula.





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