On Thu, 22 May 2008, Martin Simmons wrote:

> Bweare that testing from /dev/zero might not give a realistic result if the
> drive has compression switched on, because the phyical tape will hardly move.
> It will test the interface card's speed nicely :-)
>
> It is probably better to make a large file containing real data, e.g. tar from
> /usr/lib.  You could also compress the file with gzip, which will prevent the
> drive from doing any compression.

Or use /dev/random.

It's a good idea to test limits by using /dev/zero or /dev/random and
sources and /dev/null as sink to see what dd reports. This will help give
some ideas of where your bottlenecks are.

AB


-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2008.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
_______________________________________________
Bacula-users mailing list
Bacula-users AT lists.sourceforge DOT net
https://lists.sourceforge.net/lists/listinfo/bacula-users