On 07/ 9/15 02:45 PM, [email protected] wrote:
>
> Zitat von Claas Goltz <[email protected]>:
>
>> Hi there,
>> I'm using an HP MSL2024 Tape Library. If i have a look at my volumes, I see 
>> that bareos is only writing round about 3,7TB each tape:
>>
>> | mediaid | volumename | volstatus | enabled | volbytes          | volfiles 
>> | volretention | recycle | slot | inchanger | mediatype | lastwritten        
>>  |
>>
>> |     397 | BKA659L6   | Full      |       1 | 4,088,514,705,408 |    4,098 
>> |   31,536,000 |       1 |    9 |         1 | LTO-6     | 2015-07-08 
>> 07:59:45 |
>>
>>
>> thats only ~60% of the maximum capacity. What could be the reason?
>
> Marketing overestimate the efficiency of compression with real world data. 
> LTO6 can hold 2.5TB native data to my knowledge.
>
Correct

https://en.wikipedia.org/wiki/Linear_Tape-Open

So not to bad to be honest 1:1.5 compression. 1:2.5 as stated you probably need 
to only store ASCII.

-- 
Marco van Wieringen                   [email protected]
Bareos GmbH & Co. KG                  Phone: +49-221-63069389
http://www.bareos.com                     

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