'RAID Controller'

On Mon, 11 Oct 2010 15:57:57 -0700, "Don Schmidt" Don
red_1987 wrote:

The need to have RAID or not would depend on how you value your data. I
have a RAID setup for I value my data very highly; I also backup monthly to
a RAID network drive. The only extra costs for having RAID is the cost of a
second hard drive and these days, pennies compared to the '80's. My first
hard drive was a SCSI drive with an Atari computer; the 20mb drive retailed
for $900! I was very fortunate for I got it at a discount price of $750!!
How times have changed.


RAID 1 (mirroring) is *not* a backup solution. RAID 1 uses two or
more drives, each a duplicate of the others, to provide redundancy,
not backup. It's used in situations (almost always within
corporations, not in homes) where any downtown can't be tolerated,
because the way it works is that if one drive fails the other takes
over seamlessly. Although some people thing of RAID 1 as a backup
technique, that is *not* what it is, since it's subject to
simultaneous loss of the original and the mirror to many of the most
common dangers threatening your data--severe power glitches, nearby
lightning strikes, virus attacks, theft of the computer, etc. Most
companies that use RAID 1 also have a strong external backup plan in
place.

"Why RAID is (usually) a Terrible Idea"
http://www.pugetsystems.com/articles?&id=29

--
Ken Blake, Microsoft MVP (Windows Desktop Experience) since 2003
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