Holikar, Sachin (ext) schrieb:
> Hello,
> 
> In Bacula, we are using LTO-3 Tapes defined in a volume. One strange this we 
> notice is , the tapes are marked as full for different Volume Bytes written.
> Please see below, for one tape, it shows as around 800 GB of Bytes written 
> and marked as Full (eg AAD413). At the same time other tape is written only 
> 400 GB and showing as Full (E.g AAD483).
> Is there anything we are missing out to understand or it is something else.
> Kindly suggest.
> 
> 
> Here is the current status of the list volumes,
> 
> week
> Volume Name Volume Bytes   Media Type When expire? Last Written Volume Status
> AAD413   832.36 GB   LTO-3  2009/10/02 2009/06/04   Full
> AAD463   837.05 GB LTO-3  2009/08/31 2009/05/03   Full
> AAD465   1.17 TB  LTO-3  2009/09/14 2009/05/17   Full
> AAD473   125.13 GB LTO-3  2009/10/09 2009/06/11   Append
> AAD477   501.69 GB LTO-3  2009/08/02 2009/04/04   Full
> AAD479   503.99 GB LTO-3  2009/06/07 2009/02/07   Full
> AAD483   460.94 GB LTO-3   2009/09/26 2009/05/29   Full


LTO3 tapes have a native capacity of 400 GB. If you store data that is
highly compressable more data fits on a tape. If you have already
compressed data like zip files, only 400 GB will fit on a tape.

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

Ralf

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