[TriLUG] New system configuration thoughts

Kevin Flanagan flanagannc at gmail.com
Wed May 2 19:27:37 EDT 2007


How is RAID mirroring not redundancy?  It's redundancy where you don't have
a system outage in order to replace a disk that has failed.  Odds are in
your favor that you won't have 2 failures at the same time.  Mirror first,
_then_ you replicate the data to another system.

Kevin

On 5/2/07, John Mitchell <john280z at gmail.com> wrote:
>
> On 5/1/07, Jim Tuttle <jtuttle at prairienet.org> wrote:
> > So, I've got a new system on the way and had a couple of questions
> > someone here might have answers to.
> >
> < snip>
> > Second, I wonder about hard drive configuration.  It's always been my
> > policy to have 2 matched drives, say sda and sdb, and to back up each to
> > the opposite drive. <snip>
>
>    I wanted to look up some URLs first, but redundancy is better than
> Raid:
>
> http://hardware.slashdot.org/article.pl?sid=07/02/18/0420247
>
> http://hardware.slashdot.org/article.pl?sid=07/02/21/004233
>
> (from StorageMojo)
> the Google File System's central redundancy concept: forget RAID, just
> replicate the data three times.
>
> john  mitchell
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