Hello Marco,

> i have: 
> Maximum blocksize = 512K



I usually don't like setting fixed block sizes, but letting Bacula determine. 
But Maximum Block Size = 1 MB or even a little bit more should be safe for 
LTO-9.

https://www.bacula.lat/otimizando-a-velocidade-de-fitas/

https://www.bareos.com/whitepapers/optimizing-the-tape-speed.pdf

You can use the btape speed test to verify the best values.

The File Size also exerts a role in performance, a trade-off if I remember well 
between backup and restore speeds.




Rgds.
MSc,MBA Heitor Faria (Miami/USA)
Bacula LATAM CIO

mobile1: + 1 909 655-8971
mobile2: + 55 61 98268-4220

        

bacula.lat | bacula.com.br



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