[TriLUG] New system configuration thoughts

[Kevin Jones]

I'll attest to that as it happened to me. Since that event I have never trusted RAID 5 again and have opted for RAID 6 whenever possible. Of course, if you can't do RAID 6 always, always have a hot spare online so the rebuild can begin immediately.

Kevin

----- Original Message ----
From: Brian Henning <Brian.Henning at datadirect.com>
To: Triangle Linux Users Group discussion list <trilug at trilug.org>
Sent: Wednesday, May 2, 2007 7:53:23 PM
Subject: RE: [TriLUG] New system configuration thoughts

Kevin Flanagan supposed:

> 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.

Ever heard the suggestion about always replacing your headlights in
pairs?  The odds of having two failures (of equally-aged,
equally-stressed hardware, as in a RAID mirroring setup) at the same
time are fairly high.

~B


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