Re: RAID array for home



On Sat, 29 Sep 2007 15:37:52 +0100, GB wrote:

"GSV Three Minds in a Can" <GSV@xxxxxxxxxxxxxxxx> wrote in message
news:DLxggNEOdl$GFAbS@xxxxxxxxxxxxxxxxxx
Bitstring <1i57tte.1eghku3cxa0yeN%me@xxxxxxxxxxx>, from the wonderful
person xmas <me@xxxxxxxxxxx> said
After a recent drive failure, I want to set up a RAID array at home both
for speed of data access and redundancy. Never set one up before, but
would like to do it in hardware rather than relying on Windows: any
recommendations?

'Don't' would probably be my first response.

'Do' would be mine!


Speed - you won't see much, if any, benefit unless you are routinely using
huge files.

RAID 1 is duplication, and there should be no speed improvement.


Depends, if your RAID 1 implements independent reads then there will be a
speed improvement. Basically the RAID controller trusts that the data
coming from the drive, because if there is anything wrong then the drive
will let you know. In which case it can read different things from the two
drives at the same time, and read throughput doubles. Writes of course
require the use of both drives.

There is some potential loss of robustness compared to reading the same
information from both drives and comparing. However in all but the most
extreme requirements on reliability this is of negligible concern.


JAB.

--
Jonathan A. Buzzard Email: jonathan (at) buzzard.me.uk
Northumberland, United Kingdom. Tel: +44 1661-832195
.



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