From owner-freebsd-isp@FreeBSD.ORG  Tue Oct 23 21:28:15 2007
Return-Path: <owner-freebsd-isp@FreeBSD.ORG>
Delivered-To: freebsd-isp@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 9BE8616A418
	for <freebsd-isp@freebsd.org>; Tue, 23 Oct 2007 21:28:15 +0000 (UTC)
	(envelope-from Albert.Shih@obspm.fr)
Received: from mesiob.obspm.fr (mesiob.obspm.fr [145.238.2.2])
	by mx1.freebsd.org (Postfix) with ESMTP id 4503313C4AA
	for <freebsd-isp@freebsd.org>; Tue, 23 Oct 2007 21:28:15 +0000 (UTC)
	(envelope-from Albert.Shih@obspm.fr)
Received: from localhost (pcjas.obspm.fr [145.238.184.3])
	by mesiob.obspm.fr (8.13.4/8.13.4/SIO Observatoire de Paris) with ESMTP
	id l9NJv7Ym031514; Tue, 23 Oct 2007 21:57:07 +0200
Date: Tue, 23 Oct 2007 21:57:07 +0200
From: Albert Shih <Albert.Shih@obspm.fr>
To: Paulo Fragoso <paulo@nlink.com.br>
Message-ID: <20071023195707.GD62076@pcjas.obspm.fr>
References: <471E2290.9040704@nlink.com.br>
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <471E2290.9040704@nlink.com.br>
User-Agent: Mutt/1.5.16 (2007-06-09)
X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-2.0.2
	(mesiob.obspm.fr [145.238.2.2]);
	Tue, 23 Oct 2007 21:57:07 +0200 (CEST)
X-Virus-Scanned: ClamAV version 0.91.2,
	clamav-milter version 0.91.2 on mesiob.obspm.fr
X-Virus-Status: Clean
Cc: freebsd-isp@freebsd.org
Subject: Re: Backups Hardwares for FreeBSD
X-BeenThere: freebsd-isp@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
Reply-To: Albert.Shih@obspm.fr
List-Id: Internet Services Providers <freebsd-isp.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-isp>,
	<mailto:freebsd-isp-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-isp>
List-Post: <mailto:freebsd-isp@freebsd.org>
List-Help: <mailto:freebsd-isp-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-isp>,
	<mailto:freebsd-isp-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 23 Oct 2007 21:28:15 -0000

 Le 23/10/2007 à 13:34:24-0300, Paulo Fragoso a écrit
> Hi,
> 
> We have a FreeBSD mail server with 1TB RAID 6 using Areca ARC-1220 
> controler, all works fine.
> 
> Today our backups are made on DDS-4 tapes, they are very slow and too 
> small, this is our problem. What is a good (modern) alternative to DDS-4 
> working on FreeBSD?

You can use LTO-4 (more expensive) or LTO-3.

It's working like any SCSI device by using tar command.

You got with LTO-4 800Go on one tape without any comprress. And if you put
only mail the compressing working very well and you can put all your file
on one tape.

The speed is very good. On Linux server (but this change nothing) with
LTO-3 we god 30 Mo/s

Regards
--
Albert SHIH
Observatoire de Paris Meudon
SIO batiment 15
Heure local/Local time:
Mar 23 oct 2007 21:53:20 CEST