Amanda-Users

Re: RE Compression usage

2006-07-06 06:10:37
Subject: Re: RE Compression usage
From: "Joe Donner (sent by Nabble.com)" <lists AT nabble DOT com>
To: amanda-users AT amanda DOT org
Date: Thu, 6 Jul 2006 03:03:15 -0700 (PDT)
Sorry to be bothersome about this, but will the below work?


Joe Donner wrote:
> 
> Thanks for your reply.
> 
> do you mean that I will see the behaviour you're describing only if I'm
> reusing tapes with hardware-compressed data?  I only have 3 tapes so far,
> so don't mind erasing them.
> 
> I find this slightly confusing.  My understanding at this stage is that as
> long as I start with "fresh" tapes, and then use mt -f /dev/nst0
> defcompression 0 to switch off hardware compression, I should be OK from
> then onwards?  Surely the argument about the tape drive switching into
> compression mode (when fed a hardware-compressed tape) then also works the
> other way round, i.e. when a tape drive has hardware compression enabled,
> and is fed a non-hardware compressed tape, then it won't enable hardware
> compression?
> 
> I see that you're saying use stinit, but I've had a look at that and at
> this stage it will only add more complexity to (for me) a rather complex
> situation.
> 
> If I could get away with erasing 3 tapes, using mt -f /dev/nst0
> defcompression 0 (maybe add that into crontab for good measure), and it
> all works reasonably well, then I'll be happy for now.
> 
> Will appreciate your thoughts and thanks a lot for being so helpful.
> 
> Joe
> 

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