On some Unix systems it's the "device" you select that determines if
hardware compression is used or not.  We switched from Solaris over to
Windows about 6 years ago (not my idea) so the details are a bit fuzzy
but for instance the basic tape drive is "/dev/rmt/0".  Then to modify
the behavior you append letters to that name.  The letters I see (from a
quick Google search) are l (low density), m (medium), h (high), u
(ultra), c (compressed), & n (no rewind).  So when I was running
Networker on Solaris I used the "/dev/rmt/0cbn" device for compression
and no rewind (the "b" had something to do with the drive acting like a
Berkley rather than System V device I think).  I don't know if any of
that applies to HP systems but it might give you a clue about what to
look for.

Dave Werth
Garmin AT, Inc.
Salem, Oregon

-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of MIchael Leone
Sent: Tuesday, February 26, 2008 12:20 PM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Compression on Win2003 servers question

EMC NetWorker discussion <NETWORKER AT LISTSERV.TEMPLE DOT EDU> wrote on 
02/26/2008 09:22:01 AM:

> Hello,
> There are different ways to handle compression, i prefer letting the 
> Hardware  ( Tapes) handle it ( The utilities\program that comes with 
your 
> Tape Library or Device\driver will let you set the compression).

So I would have thought. However, I see no such option with the "HP 
Library and Tape Tools" does not seem to provide such an option, that I 
can see.

I'd prefer hardware compression; however, at this point, I'll take what
I 
can get. :-)

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