[GRLUG] To Raid, or not to Raid, that is the question.

[Don Wood]

If it's not for data redundancy then what is RAID for? If a backup is made
why bother with RAID at all? I'd rather have a RAID 1 than a backup.
Although my preference would be RAID 1 with a backup. But really, RAID is a
form of redundancy so why not use it as such? Isn't a backup a form of
redundancy?

-----Original Message-----
From: grlug-bounces at grlug.org [mailto:grlug-bounces at grlug.org] On Behalf Of
Michael Mol
Sent: Wednesday, March 09, 2011 7:15 PM
To: Mailing List for LUG in greater Grand Rapids, MI area.
Subject: Re: [GRLUG] To Raid, or not to Raid, that is the question.

On Thu, Mar 10, 2011 at 12:05 AM, Joseph VanDerStelt
<joseph.vanderstelt at gmail.com> wrote:
> So, here is the situation. I am about to send a server down to a data 
> center in Indiana. I just purchased two WD 1GB hard drives to place in 
> it for extra storage. I also bought a $25 raid controller, just in 
> case. Should I even bother with the raid? I was going to go raid 1, so 
> as not to risk losing my data and other peoples data. However, I have 
> to ask... Would simply creating a cron job to backup key 
> directories/files every 2 hours or so get the job done just as well?
>
> Just looking for a little input and maybe spark some debate.
>
> So far, I am leaning towards raid 1.

There's a saying: "RAID is not a backup"

If you want it for backup purposes, then you might find a better solution
somewhere in the realm of snapshots and/or incremental backups.

With Rosetta Code, I have a nightly backup job that lumps the database and a
few file paths into a tarball on another machine, compresses the tarball,
and waits for my home machine to retrieve it.

In your case, you might consider something similar, but drop the tarballs
onto your spare disk. Or even not compress, but place them on a partition on
top of lvm which you can snapshot after each backup.

--
:wq

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