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 :: Mailing Lists

[ILUG] Hardware and Software raid

[ILUG] Hardware and Software raid

Ronan Waide waider at waider.ie
Thu Jul 11 21:42:24 IST 2002


On July 11, longword at esatclear.ie said:
> 
> Most people RAID for security more than speed. Hardware RAID is 
> generally perceived as 'safer'.
> 
> Paul.

Again, that's a "fact" without anything to back it. The RAID setups
I've worked have been far more concerned with speed of access to data
and use of logically large disks for things like databases. Aside from
which, the above still doesn't make sense: why is it safer to send
your data to a raid controller only to have it sent back to be
checksummed/replicated/whatever before beeing written down to disk?
Seems like you're increasing the complexity of the write process,
and more to the point increases the risk of putting inconsistent data
on the disk.

I'm just looking for some backup (ha!) on these facts, I guess. Not
doubting that you don't have it or questioning your expertise or
anything.

Cheers,
Waider.
-- 
waider at waider.ie / Yes, it /is/ very personal of me.
"So, these portents, taken together with the eclipse and casting this
 disembowelled handset over my desk... um, ...  oh dear ... I think I need to
 order a new phone from MIS." - james coleman




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