Amanda-Users

Re: tapetype definitions

2006-06-02 18:14:55
Subject: Re: tapetype definitions
From: Jon LaBadie <jon AT jgcomp DOT com>
To: amanda-users AT amanda DOT org
Date: Fri, 2 Jun 2006 18:07:57 -0400
On Fri, Jun 02, 2006 at 11:23:11PM +0200, Paul Bijnens wrote:
> Chris Lee schreef:
> >Just to add to the whole tape type thing :)
> >I ran amtapetype on my DLT8000 (40/80GB) using a DLTIV tape.
> >Now I assumed that it should give me a 40GB capacity as I have hardware 
> >compression off.
> >But I get the following:
> >define tapetype DLT8000 {
> >    comment "just produced by tapetype prog (hardware compression off)"
> >    length 36650 mbytes
> >    filemark 0 kbytes
> >    speed 3944 kps
> >}
> >
> >Now it is not far off but should it not be closer?
> >Also I get a lot of shoe shining during amtapetype run
> 
> 
> Two remarks:
> 40 GB on the tape is means about 40 * 1000 * 1000 * 1000 bytes.
> Amanda counts in powers of 2:  40000000000/(1024*1024*1024) = 37.25 GiB
> 

I would always claim that when I saw low numbers.
But my recently aquired LTO-1, nominally 100GB and thus should measure 94GB,
actually measured 101+ amanda GB :)

-- 
Jon H. LaBadie                  jon AT jgcomp DOT com
 JG Computing
 4455 Province Line Road        (609) 252-0159
 Princeton, NJ  08540-4322      (609) 683-7220 (fax)

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