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Date:      Thu, 11 Jul 2002 23:53:27 -0700 (PDT)
From:      "Andrew P. Lentvorski" <bsder@mail.allcaps.org>
To:        Gerhard Sittig <Gerhard.Sittig@gmx.net>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: Software raid 1 on root partition?
Message-ID:  <20020711233706.G73169-100000@mail.allcaps.org>
In-Reply-To: <20020711232331.U1494@shell.gsinet.sittig.org>

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On Thu, 11 Jul 2002, Gerhard Sittig wrote:

> And in all the thread's length I still question the benefit of
> running your root fs in software RAID.

Well, you can take a complete backup of the system simply by removing one
of each pair of the RAID 1 drives if the root fs is also RAID 1.

Given how cheap hard drives have gotten and how expensive high capacity
backup systems are nowadays, removing one half of a RAID 1 array and
replacing it with new drives is a really fast, cost-effective backup
method.  You can often buy a hard drive for not much more than a
high-capacity (> 20GB) tape cartridge.  And you can buy 50-100 drives for
the price of a high-capacity automated tape drive.

Several small engineering companies I know use this method.  It generally
is superior to tape backups until the company can actually afford an
automated tape handling system.

-a


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