Re: [Bacula-users] no compression using seagate scorpian dss-4 drive

[Arno L. <al...@it...>]

Hello,

Christopher Mosentine wrote:

> Hello:  I am using bacula with my seagate scorpian dss-4 drive.  I
> love how bacula has support for my tape drive right out-of-the-box.
> 
> Bacula is running fine but I am not able to achive any compression as
> I am only able to put about 17GB on a tape.  I routinely backup about
> 32GB and would love to get it all on 1 tape.  I used to use Arkeia but
> achived the same results.  I have checked and the device IS set with
> hardware compression ENABLED (via dip switch).
> 
> So, I know there are others out there using this same drive - have you
> been able to get hardware compression to work??  If so how??

Have you tried checking if compression is enabled using mt or tapeinfo?
Then, you can verify the actual tape capacity using random data and dd.

To my knowledge, DDS-4 is 20GB uncompressed, so, assuming not further 
compressible data 17GB is not unrealistic, considering the 10^3 vs. 2^10 
differences...

Arno

> Thanks, Chris.
> 
> 
> -------------------------------------------------------
> This SF.Net email is sponsored by Yahoo.
> Introducing Yahoo! Search Developer Network - Create apps using Yahoo!
> Search APIs Find out how you can build Yahoo! directly into your own
> Applications - visit http://developer.yahoo.net/?fr=fad-ysdn-ostg-q22005
> _______________________________________________
> Bacula-users mailing list
> Bac...@li...
> https://lists.sourceforge.net/lists/listinfo/bacula-users

-- 
IT-Service Lehmann                    al...@it...
Arno Lehmann                  http://www.its-lehmann.de