I wouldn’t bother.  Modern LTO drives (any made in lay 10 years) auto detect 
end of volume. I do t use this setting at all with my two drives and it auto 
sorts it out. 

This is important because the 15T quoted assumes compression of a given ratio. 
That can very drastically. If you use client side compression you won’t see any 
compression at all. Similar if most your data are video and doesn’t compress 
well. If it’s all text emails you will get more than listed. 

Let the drive auto detect and it will work the best. I think this is one of the 
things you can test with the btape command. Highly recommend you run all the 
tests in btape abd make sure they pass. 

I only use max volume size with disk volumes.

Sent from my iPhone
Brock Palen
989-277-6075

> On Dec 25, 2020, at 12:38 PM, 'Frank Cherry' via bareos-users 
> <[email protected]> wrote:
> 
> 
> Hello there,
> 
> I'm storing on Ultrium 7 LTO tapes with a single drive unit. 
> It is right, to set in the pool config the   
> 
> Maximum Volume Bytes = 15000G          # Limit Volume size to something 
> reasonable
> 
> to 15000G ? The tape is specified with 6 / 15 TB (uncompressed / compressed)
> 
> Is the tape drive works as default with compression? How can I check it and 
> can I define it on the SD config?
> 
> Thanks, Frank
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