>>>>> On Mon, 02 May 2011 13:15:28 +0200, Uwe Mohn said:
> 
> Hello all,
> 
> is it possible to decompress the files on a job when it is migrated to tape?

No.


> The backround is: we want to keep the last set of full, differential and 
> incremental backups on tape for fast restore. As soon as a new full 
> backup is done, we want to migrate the last full to tape (differentials 
> and incrementals will be recycled without migration).
> To save disk space we would like to compress the disk backups. But (as 
> also mentioned in the documentation) it would be counterproductively to 
> write compressed data to tapes with hardware compression.
> Following the documentation the software compression is done by 
> file-deamon. When now a job is migratet to a device wich has set 
> "AllowCompression=no" due to hardware compression will the data be 
> decompressed before transferred to tape?
> Is ist possible to achive this behavior?

If your tape is LTO then don't worry about it -- sending compressed data to
the tape won't cause any problems.

The manual says to avoid it for regular backups because the hardware
compression is usually much faster.

__Martin

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