Veritas-bu

Re: [Veritas-bu] LTO tapes handling more that it supposed

2008-02-26 00:05:27
Subject: Re: [Veritas-bu] LTO tapes handling more that it supposed
From: "Martin Ruslan" <mit.martin AT gmail DOT com>
To: "Justin Piszcz" <jpiszcz AT lucidpixels DOT com>
Date: Tue, 26 Feb 2008 11:44:46 +0700
Dear Justin,
sounds make sense for the hardware compression.
but, I never set the hardware compression on the NBU. Did the compression do it self without any configuration triggered?
I mean, is it running automatically for few types of files or datas?
And this is happening not to all tapes.. only few tapes..
some is oracle database, and some is windows flatfile.

@Simon:
hopefully not David Copperfield who make strange thing happens on my backup.. :)

@everyone:
So this is normal if it's a database backup? (specially oracle).
just trying to describe all the inputs.. :)

Rgrds,
Martin

On Mon, Feb 25, 2008 at 7:04 PM, Justin Piszcz <jpiszcz AT lucidpixels DOT com> wrote:


On Mon, 25 Feb 2008, Martin Ruslan wrote:

> Dear gurus,
> have you ever meet this condition?
> My LTO3 tapes handling more than 800GB (about 1.2TB) on the media's report.
> I don't have any idea for this.. The backup not running the compression
> also..
> Is it maybe the block size or something? Need your advice..
>
> Regards,
> Martin
>

The tape drive does compression.  We see upwards of 3.0++ to 1 in some
cases.

Justin.

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